ceph/src/boost/boost/geometry/views/detail/closed_clockwise_view.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 // This file was modified by Oracle on 2014-2021.
   8 // Modifications copyright (c) 2014-2021 Oracle and/or its affiliates.
   9 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
  10
  11 // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
  12 // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
  13
  14 // Use, modification and distribution is subject to the Boost Software License,
  15 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  16 // http://www.boost.org/LICENSE_1_0.txt)
  17
  18 #ifndef BOOST_GEOMETRY_VIEWS_DETAIL_CLOSED_CLOCKWISE_VIEW_HPP
  19 #define BOOST_GEOMETRY_VIEWS_DETAIL_CLOSED_CLOCKWISE_VIEW_HPP
  20
  21 #include <type_traits>
  22
  23 #include <boost/range/begin.hpp>
  24 #include <boost/range/end.hpp>
  25 #include <boost/range/iterator.hpp>
  26
  27 #include <boost/geometry/views/closeable_view.hpp>
  28 #include <boost/geometry/views/reversible_view.hpp>
  29 #include <boost/geometry/util/order_as_direction.hpp>
  30 #include <boost/geometry/util/type_traits_std.hpp>
  31
  32 namespace boost { namespace geometry
  33 {
  34
  35 #ifndef DOXYGEN_NO_DETAIL
  36 namespace detail
  37 {
  38
  39
  40 template
  41 <
  42     typename Range,
  43     closure_selector Closure = geometry::closure<Range>::value,
  44     order_selector Order = geometry::point_order<Range>::value
  45 >
  46 struct closed_clockwise_view
  47 {
  48     using closed_view = detail::closed_view<Range const, Closure>;
  49     using view = detail::clockwise_view<closed_view const, Order>;
  50
  51     explicit inline closed_clockwise_view(Range const& r)
  52         : m_view(closed_view(r))
  53     {}
  54
  55     using iterator = typename boost::range_iterator<view const>::type;
  56     using const_iterator = typename boost::range_iterator<view const>::type;
  57
  58     inline const_iterator begin() const { return boost::begin(m_view); }
  59     inline const_iterator end() const { return boost::end(m_view); }
  60
  61 private:
  62     view m_view;
  63 };
  64
  65
  66 } // namespace detail
  67 #endif // DOXYGEN_NO_DETAIL
  68
  69
  70 #ifndef DOXYGEN_NO_TRAITS_SPECIALIZATIONS
  71 namespace traits
  72 {
  73
  74 template <typename Range, closure_selector Closure, order_selector Order>
  75 struct tag<detail::closed_clockwise_view<Range, Closure, Order> >
  76     : geometry::tag<Range>
  77 {};
  78
  79 template <typename Range, closure_selector Closure, order_selector Order>
  80 struct point_order<detail::closed_clockwise_view<Range, Closure, Order> >
  81 {
  82     static const order_selector value = clockwise;
  83 };
  84
  85 template <typename Range, closure_selector Closure, order_selector Order>
  86 struct closure<detail::closed_clockwise_view<Range, Closure, Order> >
  87 {
  88     static const closure_selector value = closed;
  89 };
  90
  91 } // namespace traits
  92 #endif // DOXYGEN_NO_TRAITS_SPECIALIZATIONS
  93
  94
  95 }} // namespace boost::geometry
  96
  97
  98 #endif // BOOST_GEOMETRY_VIEWS_DETAIL_CLOSED_CLOCKWISE_VIEW_HPP