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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_VIEWS_DETAIL_RANGE_TYPE_HPP | |
15 | #define BOOST_GEOMETRY_VIEWS_DETAIL_RANGE_TYPE_HPP | |
16 | ||
17 | ||
18 | #include <boost/mpl/assert.hpp> | |
19 | #include <boost/range/value_type.hpp> | |
20 | ||
21 | #include <boost/geometry/core/ring_type.hpp> | |
22 | #include <boost/geometry/core/tag.hpp> | |
23 | #include <boost/geometry/core/tags.hpp> | |
24 | ||
25 | #include <boost/geometry/views/box_view.hpp> | |
26 | ||
27 | namespace boost { namespace geometry | |
28 | { | |
29 | ||
30 | ||
31 | #ifndef DOXYGEN_NO_DISPATCH | |
32 | namespace dispatch | |
33 | { | |
34 | ||
35 | ||
36 | template <typename Geometry, | |
37 | typename Tag = typename tag<Geometry>::type> | |
38 | struct range_type | |
39 | { | |
40 | BOOST_MPL_ASSERT_MSG | |
41 | ( | |
42 | false, NOT_OR_NOT_YET_IMPLEMENTED_FOR_THIS_GEOMETRY_TYPE | |
43 | , (types<Geometry>) | |
44 | ); | |
45 | }; | |
46 | ||
47 | ||
48 | template <typename Geometry> | |
49 | struct range_type<Geometry, ring_tag> | |
50 | { | |
51 | typedef Geometry type; | |
52 | }; | |
53 | ||
54 | ||
55 | template <typename Geometry> | |
56 | struct range_type<Geometry, linestring_tag> | |
57 | { | |
58 | typedef Geometry type; | |
59 | }; | |
60 | ||
61 | ||
62 | template <typename Geometry> | |
63 | struct range_type<Geometry, polygon_tag> | |
64 | { | |
65 | typedef typename ring_type<Geometry>::type type; | |
66 | }; | |
67 | ||
68 | ||
69 | template <typename Geometry> | |
70 | struct range_type<Geometry, box_tag> | |
71 | { | |
72 | typedef box_view<Geometry> type; | |
73 | }; | |
74 | ||
75 | ||
76 | // multi-point acts itself as a range | |
77 | template <typename Geometry> | |
78 | struct range_type<Geometry, multi_point_tag> | |
79 | { | |
80 | typedef Geometry type; | |
81 | }; | |
82 | ||
83 | ||
84 | template <typename Geometry> | |
85 | struct range_type<Geometry, multi_linestring_tag> | |
86 | { | |
87 | typedef typename boost::range_value<Geometry>::type type; | |
88 | }; | |
89 | ||
90 | ||
91 | template <typename Geometry> | |
92 | struct range_type<Geometry, multi_polygon_tag> | |
93 | { | |
94 | // Call its single-version | |
95 | typedef typename dispatch::range_type | |
96 | < | |
97 | typename boost::range_value<Geometry>::type | |
98 | >::type type; | |
99 | }; | |
100 | ||
101 | ||
102 | } // namespace dispatch | |
103 | #endif // DOXYGEN_NO_DISPATCH | |
104 | ||
105 | // Will probably be replaced by the more generic "view_as", therefore in detail | |
106 | namespace detail | |
107 | { | |
108 | ||
109 | ||
110 | /*! | |
111 | \brief Meta-function defining a type which is a boost-range. | |
112 | \details | |
113 | - For linestrings and rings, it defines the type itself. | |
114 | - For polygons it defines the ring type. | |
115 | - For multi-points, it defines the type itself | |
116 | - For multi-polygons and multi-linestrings, it defines the single-version | |
117 | (so in the end the linestring and ring-type-of-multi-polygon) | |
118 | \ingroup iterators | |
119 | */ | |
120 | template <typename Geometry> | |
121 | struct range_type | |
122 | { | |
123 | typedef typename dispatch::range_type | |
124 | < | |
125 | Geometry | |
126 | >::type type; | |
127 | }; | |
128 | ||
129 | } | |
130 | ||
131 | }} // namespace boost::geometry | |
132 | ||
133 | ||
134 | #endif // BOOST_GEOMETRY_VIEWS_DETAIL_RANGE_TYPE_HPP |