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diff --git a/src/functors/genericF.hh b/src/functors/genericF.hh
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+/*  This file is part of the OpenLB library
+*
+*  Copyright (C) 2012-2013 Lukas Baron, Mathias J. Krause, Albert Mink
+*  E-mail contact: info@openlb.net
+*  The most recent release of OpenLB can be downloaded at
+*  <http://www.openlb.net/>
+*
+*  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 2
+*  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, write to the Free
+*  Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+*  Boston, MA  02110-1301, USA.
+*/
+
+#ifndef GENERIC_F_HH
+#define GENERIC_F_HH
+
+
+/** \file
+ * The description of a generic interface for all functor classes
+ * -- generic implementation.
+ */
+
+#include"genericF.h"
+
+
+namespace olb {
+
+template <typename T, typename S>
+GenericF<T,S>::GenericF (int targetDim, int sourceDim) : _n(targetDim), _m(sourceDim)
+{
+}
+
+template <typename T, typename S>
+GenericF<T,S>::~GenericF () {}
+
+template <typename T, typename S>
+int GenericF<T,S>::getSourceDim() const
+{
+  return _m;
+}
+
+template <typename T, typename S>
+int GenericF<T,S>::getTargetDim() const
+{
+  return _n;
+}
+
+template <typename T, typename S>
+std::string& GenericF<T,S>::getName()
+{
+  return _name;
+}
+
+template <typename T, typename S>
+std::string const& GenericF<T,S>::getName() const
+{
+  return _name;
+}
+
+template <typename T, typename S>
+bool GenericF<T,S>::operator() (T output[])
+{
+  S tmp[0];
+  return operator()(output,tmp);
+}
+
+template <typename T, typename S>
+bool GenericF<T,S>::operator() (T output[], S input0)
+{
+  S tmp[1] = {input0};
+  return operator()(output,tmp);
+}
+
+template <typename T, typename S>
+bool GenericF<T,S>::operator() (T output[], S input0, S input1)
+{
+  S tmp[2] = {input0,input1};
+  return operator()(output,tmp);
+}
+
+template <typename T, typename S>
+bool GenericF<T,S>::operator() (T output[], S input0, S input1, S input2)
+{
+  S tmp[3] = {input0,input1,input2};
+  return operator()(output,tmp);
+}
+
+template <typename T, typename S>
+bool GenericF<T,S>::operator() (T output[], S input0, S input1, S input2, S input3)
+{
+  S tmp[4] = {input0,input1,input2,input3};
+  return operator()(output,tmp);
+}
+
+} // end namespace olb
+
+#endif