1 // Boost.Geometry
2
3 // Copyright (c) 2015 Oracle and/or its affiliates.
4
5 // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
6 // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
7
8 // Use, modification and distribution is subject to the Boost Software License,
9 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
10 // http://www.boost.org/LICENSE_1_0.txt)
11
12 #ifndef BOOST_GEOMETRY_UTIL_HAS_NAN_COORDINATE_HPP
13 #define BOOST_GEOMETRY_UTIL_HAS_NAN_COORDINATE_HPP
14
15 #include <cstddef>
16
17 #include <boost/type_traits/is_floating_point.hpp>
18
19 #include <boost/geometry/core/access.hpp>
20 #include <boost/geometry/core/coordinate_dimension.hpp>
21 #include <boost/geometry/core/coordinate_type.hpp>
22
23 #include <boost/math/special_functions/fpclassify.hpp>
24
25
26 namespace boost { namespace geometry
27 {
28
29 #ifndef DOXYGEN_NO_DETAIL
30 namespace detail
31 {
32
33 struct isnan
34 {
35 template <typename T>
applyboost::geometry::detail::isnan36 static inline bool apply(T const& t)
37 {
38 return boost::math::isnan(t);
39 }
40 };
41
42 template
43 <
44 typename Point,
45 typename Predicate,
46 bool Enable,
47 std::size_t I = 0,
48 std::size_t N = geometry::dimension<Point>::value
49 >
50 struct has_coordinate_with_property
51 {
applyboost::geometry::detail::has_coordinate_with_property52 static bool apply(Point const& point)
53 {
54 return Predicate::apply(geometry::get<I>(point))
55 || has_coordinate_with_property
56 <
57 Point, Predicate, Enable, I+1, N
58 >::apply(point);
59 }
60 };
61
62 template <typename Point, typename Predicate, std::size_t I, std::size_t N>
63 struct has_coordinate_with_property<Point, Predicate, false, I, N>
64 {
applyboost::geometry::detail::has_coordinate_with_property65 static inline bool apply(Point const&)
66 {
67 return false;
68 }
69 };
70
71 template <typename Point, typename Predicate, std::size_t N>
72 struct has_coordinate_with_property<Point, Predicate, true, N, N>
73 {
applyboost::geometry::detail::has_coordinate_with_property74 static bool apply(Point const& )
75 {
76 return false;
77 }
78 };
79
80 } // namespace detail
81 #endif // DOXYGEN_NO_DETAIL
82
83 template <typename Point>
has_nan_coordinate(Point const & point)84 bool has_nan_coordinate(Point const& point)
85 {
86 return detail::has_coordinate_with_property
87 <
88 Point,
89 detail::isnan,
90 boost::is_floating_point
91 <
92 typename coordinate_type<Point>::type
93 >::value
94 >::apply(point);
95 }
96
97 }} // namespace boost::geometry
98
99 #endif // BOOST_GEOMETRY_UTIL_HAS_NAN_COORDINATE_HPP
100