ceph/src/boost/boost/geometry/core/mutable_range.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_CORE_MUTABLE_RANGE_HPP
  15 #define BOOST_GEOMETRY_CORE_MUTABLE_RANGE_HPP
  16
  17
  18 #include <cstddef>
  19
  20 #include <boost/range/value_type.hpp>
  21 #include <boost/type_traits/remove_reference.hpp>
  22
  23
  24 namespace boost { namespace geometry
  25 {
  26
  27
  28 namespace traits
  29 {
  30
  31 /*!
  32 \brief Metafunction to define the argument passed to the three
  33     traits classes clear, push_back and resize
  34 \ingroup mutable_range
  35  */
  36 template <typename Range>
  37 struct rvalue_type
  38 {
  39     typedef typename boost::remove_reference<Range>::type& type;
  40 };
  41
  42
  43 /*!
  44 \brief Traits class to clear a geometry
  45 \ingroup mutable_range
  46  */
  47 template <typename Range>
  48 struct clear
  49 {
  50     static inline void apply(typename rvalue_type<Range>::type range)
  51     {
  52         range.clear();
  53     }
  54 };
  55
  56
  57 /*!
  58 \brief Traits class to append a point to a range (ring, linestring, multi*)
  59 \ingroup mutable_range
  60  */
  61 template <typename Range>
  62 struct push_back
  63 {
  64     typedef typename boost::range_value
  65         <
  66             typename boost::remove_reference<Range>::type
  67         >::type item_type;
  68
  69     static inline void apply(typename rvalue_type<Range>::type range,
  70                  item_type const& item)
  71     {
  72         range.push_back(item);
  73     }
  74 };
  75
  76
  77 /*!
  78 \brief Traits class to append a point to a range (ring, linestring, multi*)
  79 \ingroup mutable_range
  80  */
  81 template <typename Range>
  82 struct resize
  83 {
  84     static inline void apply(typename rvalue_type<Range>::type range,
  85                 std::size_t new_size)
  86     {
  87         range.resize(new_size);
  88     }
  89 };
  90
  91
  92 } // namespace traits
  93
  94
  95 }} // namespace boost::geometry
  96
  97
  98 #endif // BOOST_GEOMETRY_CORE_MUTABLE_RANGE_HPP