algorithms/detail/calculate_null.hpp

0001 // Boost.Geometry (aka GGL, Generic Geometry Library)
0002
0003 // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
0004 // Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
0005 // Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
0006
0007 // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
0008 // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
0009
0010 // Use, modification and distribution is subject to the Boost Software License,
0011 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
0012 // http://www.boost.org/LICENSE_1_0.txt)
0013
0014 #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_CALCULATE_NULL_HPP
0015 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_CALCULATE_NULL_HPP
0016
0017 namespace boost { namespace geometry
0018 {
0019
0020 #ifndef DOXYGEN_NO_DETAIL
0021 namespace detail
0022 {
0023
0024 struct calculate_null
0025 {
0026     template<typename ReturnType, typename Geometry, typename Strategy>
0027     static inline ReturnType apply(Geometry const& , Strategy const&)
0028     {
0029         return ReturnType();
0030     }
0031 };
0032
0033 } // namespace detail
0034 #endif // DOXYGEN_NO_DETAIL
0035
0036 }} // namespace boost::geometry
0037
0038 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_CALCULATE_NULL_HPP