1 // Boost.Geometry
2 
3 // Copyright (c) 2014 Adam Wulkiewicz, Lodz, Poland.
4 
5 // Use, modification and distribution is subject to the Boost Software License,
6 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
7 // http://www.boost.org/LICENSE_1_0.txt)
8 
9 #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_INTERIOR_ITERATOR_HPP
10 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_INTERIOR_ITERATOR_HPP
11 
12 #include <boost/range/iterator.hpp>
13 #include <boost/range/value_type.hpp>
14 
15 #include <boost/geometry/core/interior_type.hpp>
16 
17 namespace boost { namespace geometry
18 {
19 
20 #ifndef DOXYGEN_NO_DETAIL
21 namespace detail
22 {
23 
24 /*!
25 \brief Structure defining the type of interior rings iterator
26 \note If the Geometry is const, const iterator is defined.
27 \tparam Geometry \tparam_geometry
28  */
29 template <typename Geometry>
30 struct interior_iterator
31 {
32     typedef typename boost::range_iterator
33         <
34             typename geometry::interior_type<Geometry>::type
35         >::type type;
36 };
37 
38 template <typename BaseT, typename T>
39 struct copy_const
40 {
41     typedef T type;
42 };
43 
44 template <typename BaseT, typename T>
45 struct copy_const<BaseT const, T>
46 {
47     typedef T const type;
48 };
49 
50 template <typename Geometry>
51 struct interior_ring_iterator
52 {
53     typedef typename boost::range_iterator
54         <
55             typename copy_const
56                 <
57                     typename geometry::interior_type<Geometry>::type,
58                     typename boost::range_value
59                         <
60                             typename geometry::interior_type<Geometry>::type
61                         >::type
62                 >::type
63         >::type type;
64 };
65 
66 } // namespace detail
67 #endif // DOXYGEN_NO_DETAIL
68 
69 }} // namespace boost::geometry
70 
71 #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_INTERIOR_ITERATOR_HPP
72