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+///@file
+/// Type traits used for converting from and to Nasal types
+///
+// Copyright (C) 2012  Thomas Geymayer <tomgey@gmail.com>
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library 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
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+
+#ifndef SG_NASAL_TRAITS_HXX_
+#define SG_NASAL_TRAITS_HXX_
+
+#include <boost/type_traits/integral_constant.hpp>
+
+namespace nasal
+{
+  template<class T>
+  struct is_vec2: public boost::integral_constant<bool, false> {};
+
+#define SG_MAKE_TRAIT(templ,type,attr)\
+  template templ\
+  struct attr< type >:\
+    public boost::integral_constant<bool, true> {};
+
+#ifdef SGVec2_H
+  SG_MAKE_TRAIT(<class T>, SGVec2<T>, is_vec2)
+#endif
+
+#ifdef OSG_VEC2B
+  SG_MAKE_TRAIT(<>, osg::Vec2b, is_vec2)
+#endif
+
+#ifdef OSG_VEC2D
+  SG_MAKE_TRAIT(<>, osg::Vec2d, is_vec2)
+#endif
+
+#ifdef OSG_VEC2F
+  SG_MAKE_TRAIT(<>, osg::Vec2f, is_vec2)
+#endif
+
+#ifdef OSG_VEC2S
+  SG_MAKE_TRAIT(<>, osg::Vec2s, is_vec2)
+#endif
+
+#undef SG_MAKE_TRAIT
+
+} // namespace nasal
+#endif /* SG_NASAL_TRAITS_HXX_ */