add abs functor to libPMacc

src/libPMacc/include/math/vector/math_functor/abs.hpp

@@ -0,0 +1,65 @@
+/**
+ * Copyright 2013 Heiko Burau, Rene Widera
+ *
+ * This file is part of libPMacc.
+ *
+ * libPMacc is free software: you can redistribute it and/or modify
+ * it under the terms of of either the GNU General Public License or
+ * the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * libPMacc 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 and the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * and the GNU Lesser General Public License along with libPMacc.
+ * If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef MATH_FUNCTOR_ABS_HPP
+#define MATH_FUNCTOR_ABS_HPP
+
+
+#include "types.h"
+#include "lambda/Expression.hpp"
+
+namespace PMacc
+{
+namespace math
+{
+namespace math_functor
+{
+
+struct Abs
+{
+    template<typename Type>
+    HDINLINE
+    Type operator()(const Type& x) const
+    {
+        return abs(x);
+    }
+};
+
+lambda::Expression<lambda::exprTypes::terminal, mpl::vector<Abs> > _abs;
+
+} // math_vector
+} // math
+
+namespace result_of
+{
+
+template<typename Type>
+struct Functor<PMacc::math::math_functor::Abs, Type>
+{
+    typedef Type type;
+};
+
+} // result_of
+
+} // PMacc
+
+#endif // MATH_FUNCTOR_ABS_HPP