multi_sum.hpp 1.5 KB

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152
  1. // Boost.Geometry (aka GGL, Generic Geometry Library)
  2. // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
  3. // Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
  4. // Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
  5. // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
  6. // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
  7. // Use, modification and distribution is subject to the Boost Software License,
  8. // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  9. // http://www.boost.org/LICENSE_1_0.txt)
  10. #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_MULTI_SUM_HPP
  11. #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_MULTI_SUM_HPP
  12. #include <boost/range.hpp>
  13. namespace boost { namespace geometry
  14. {
  15. #ifndef DOXYGEN_NO_DETAIL
  16. namespace detail
  17. {
  18. struct multi_sum
  19. {
  20. template <typename ReturnType, typename Policy, typename MultiGeometry, typename Strategy>
  21. static inline ReturnType apply(MultiGeometry const& geometry, Strategy const& strategy)
  22. {
  23. ReturnType sum = ReturnType();
  24. for (typename boost::range_iterator
  25. <
  26. MultiGeometry const
  27. >::type it = boost::begin(geometry);
  28. it != boost::end(geometry);
  29. ++it)
  30. {
  31. sum += Policy::apply(*it, strategy);
  32. }
  33. return sum;
  34. }
  35. };
  36. } // namespace detail
  37. #endif
  38. }} // namespace boost::geometry
  39. #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_MULTI_SUM_HPP