ceph/src/boost/libs/geometry/include/boost/geometry/util/for_each_coordinate.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
   4 // Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
   5 // Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
   6
   7 // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
   8 // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
   9
  10 // Use, modification and distribution is subject to the Boost Software License,
  11 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  12 // http://www.boost.org/LICENSE_1_0.txt)
  13
  14 #ifndef BOOST_GEOMETRY_UTIL_FOR_EACH_COORDINATE_HPP
  15 #define BOOST_GEOMETRY_UTIL_FOR_EACH_COORDINATE_HPP
  16
  17 #include <boost/concept/requires.hpp>
  18 #include <boost/geometry/geometries/concepts/point_concept.hpp>
  19 #include <boost/geometry/util/add_const_if_c.hpp>
  20
  21 namespace boost { namespace geometry
  22 {
  23
  24 #ifndef DOXYGEN_NO_DETAIL
  25 namespace detail
  26 {
  27
  28 template <typename Point, int Dimension, int DimensionCount, bool IsConst>
  29 struct coordinates_scanner
  30 {
  31     template <typename Op>
  32     static inline Op apply(typename add_const_if_c
  33         <
  34             IsConst,
  35             Point
  36         >::type& point, Op operation)
  37     {
  38         operation.template apply<Point, Dimension>(point);
  39         return coordinates_scanner
  40             <
  41                 Point,
  42                 Dimension+1,
  43                 DimensionCount,
  44                 IsConst
  45             >::apply(point, operation);
  46     }
  47 };
  48
  49 template <typename Point, int DimensionCount, bool IsConst>
  50 struct coordinates_scanner<Point, DimensionCount, DimensionCount, IsConst>
  51 {
  52     template <typename Op>
  53     static inline Op apply(typename add_const_if_c
  54         <
  55             IsConst,
  56             Point
  57         >::type& , Op operation)
  58     {
  59         return operation;
  60     }
  61 };
  62
  63 } // namespace detail
  64 #endif // DOXYGEN_NO_DETAIL
  65
  66 template <typename Point, typename Op>
  67 inline void for_each_coordinate(Point& point, Op operation)
  68 {
  69     BOOST_CONCEPT_ASSERT( (concepts::Point<Point>) );
  70
  71     typedef typename detail::coordinates_scanner
  72         <
  73             Point, 0, dimension<Point>::type::value, false
  74         > scanner;
  75
  76     scanner::apply(point, operation);
  77 }
  78
  79 template <typename Point, typename Op>
  80 inline Op for_each_coordinate(Point const& point, Op operation)
  81 {
  82     BOOST_CONCEPT_ASSERT( (concepts::ConstPoint<Point>) );
  83
  84     typedef typename detail::coordinates_scanner
  85         <
  86             Point, 0, dimension<Point>::type::value, true
  87         > scanner;
  88
  89     return scanner::apply(point, operation);
  90 }
  91
  92 }} // namespace boost::geometry
  93
  94 #endif // BOOST_GEOMETRY_UTIL_FOR_EACH_COORDINATE_HPP