Add is_ray_intersection_geomtraits

This meta-function can be used to make a somewhat accurate guess if the
argument is a model of the yet to be written
AABBRayIntersectionGeomTraits.

AABB_tree/include/CGAL/internal/AABB_tree/Is_ray_intersection_geomtraits.h

@@ -0,0 +1,52 @@
+// Copyright (c) 2015 INRIA Sophia-Antipolis (France).
+// All rights reserved.
+//
+// This file is part of CGAL (www.cgal.org).
+// 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.
+//
+// Licensees holding a valid commercial license may use this file in
+// accordance with the commercial license agreement provided with the software.
+//
+// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+//
+// $URL$
+// $Id$
+//
+//
+// Author(s) : Philipp Moeller
+//
+
+#ifndef CGAL_IS_RAY_INTERSECTION_GEOMTRAITS_H
+#define CGAL_IS_RAY_INTERSECTION_GEOMTRAITS_H
+
+#include <boost/mpl/has_xxx.hpp>
+#include <boost/mpl/and.hpp>
+
+namespace CGAL {
+namespace internal {
+namespace AABB_tree {
+
+BOOST_MPL_HAS_XXX_TRAIT_NAMED_DEF(Has_ray_3,Ray_3,false)
+BOOST_MPL_HAS_XXX_TRAIT_NAMED_DEF(Has_construct_source_3,Construct_source_3,false)
+BOOST_MPL_HAS_XXX_TRAIT_NAMED_DEF(Has_vector_3,Construct_vector_3,false)
+BOOST_MPL_HAS_XXX_TRAIT_NAMED_DEF(Has_construct_cartesian_const_iterator_3,Construct_cartesian_const_iterator_3,false)
+BOOST_MPL_HAS_XXX_TRAIT_NAMED_DEF(Has_cartesian_const_iterator_3,Cartesian_const_iterator_3,false)
+
+template<typename GeomTraits>
+struct Is_ray_intersection_geomtraits
+: boost::mpl::and_< Has_ray_3<GeomTraits>,
+                    Has_construct_source_3<GeomTraits>,
+                    Has_vector_3<GeomTraits>,
+                    Has_construct_cartesian_const_iterator_3<GeomTraits>,
+                    Has_cartesian_const_iterator_3<GeomTraits> >::type
+{};
+
+
+} // AABB_tree
+} // internal
+} // CGAL
+
+#endif /* CGAL_IS_RAY_INTERSECTION_GEOMTRAITS_H */