[experimental][assembly] add convenience alias for local assembler

dumux/assembly/CMakeLists.txt

@@ -11,6 +11,7 @@ fvlocalassemblerbase.hh
 fvlocalresidual.hh
 initialsolution.hh
 jacobianpattern.hh
+localassembler.hh
 numericepsilon.hh
 partialreassembler.hh
 staggeredfvassembler.hh

dumux/assembly/localassembler.hh

+// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+// vi: set et ts=4 sw=4 sts=4:
+/*****************************************************************************
+ *   See the file COPYING for full copying permissions.                      *
+ *                                                                           *
+ *   This program 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 3 of the License, or       *
+ *   (at your option) any later version.                                     *
+ *                                                                           *
+ *   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.   *
+ *****************************************************************************/
+/*!
+ * \file
+ * \ingroup Assembly
+ * \brief Convenience alias to select a local assembler based on the discretization scheme.
+ */
+#ifndef DUMUX_LOCAL_ASSEMBLER_HH
+#define DUMUX_LOCAL_ASSEMBLER_HH
+
+#include <dumux/discretization/method.hh>
+#include "fv/boxlocalassembler.hh"
+#include "fv/cclocalassembler.hh"
+
+namespace Dumux::Experimental {
+namespace Detail {
+
+template<class LO,
+         DiscretizationMethod dm = LO::LocalContext::ElementGridGeometry::GridGeometry::discMethod>
+struct LocalAssemblerChooser;
+
+template<class LO>
+struct LocalAssemblerChooser<LO, DiscretizationMethod::box>
+{ using type = BoxLocalAssembler<LO>; };
+
+template<class LO>
+struct LocalAssemblerChooser<LO, DiscretizationMethod::cctpfa>
+{ using type = CCLocalAssembler<LO>; };
+
+template<class LO>
+struct LocalAssemblerChooser<LO, DiscretizationMethod::ccmpfa>
+{ using type = CCLocalAssembler<LO>; };
+
+} // end namespace Detail
+
+/*!
+ * \ingroup Assembly
+ * \brief Helper alias to select the local assembler type from a local operator.
+ */
+template<class LocalOperator>
+using LocalAssembler = typename Detail::LocalAssemblerChooser<LocalOperator>::type;
+
+} // end namespace Dumux::Experimental
+
+#endif