99 lines
2.3 KiB
C++
99 lines
2.3 KiB
C++
// Boost.Geometry
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// Copyright (c) 2015-2020 Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
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// Use, modification and distribution is subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_GEOMETRY_UTIL_HAS_NAN_COORDINATE_HPP
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#define BOOST_GEOMETRY_UTIL_HAS_NAN_COORDINATE_HPP
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#include <cstddef>
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#include <type_traits>
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#include <boost/geometry/core/access.hpp>
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#include <boost/geometry/core/coordinate_dimension.hpp>
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#include <boost/geometry/core/coordinate_type.hpp>
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#include <boost/math/special_functions/fpclassify.hpp>
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namespace boost { namespace geometry
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{
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#ifndef DOXYGEN_NO_DETAIL
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namespace detail
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{
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struct isnan
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{
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template <typename T>
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static inline bool apply(T const& t)
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{
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return boost::math::isnan(t);
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}
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};
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template
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<
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typename Point,
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typename Predicate,
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bool Enable,
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std::size_t I = 0,
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std::size_t N = geometry::dimension<Point>::value
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>
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struct has_coordinate_with_property
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{
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static bool apply(Point const& point)
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{
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return Predicate::apply(geometry::get<I>(point))
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|| has_coordinate_with_property
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<
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Point, Predicate, Enable, I+1, N
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>::apply(point);
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}
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};
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template <typename Point, typename Predicate, std::size_t I, std::size_t N>
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struct has_coordinate_with_property<Point, Predicate, false, I, N>
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{
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static inline bool apply(Point const&)
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{
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return false;
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}
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};
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template <typename Point, typename Predicate, std::size_t N>
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struct has_coordinate_with_property<Point, Predicate, true, N, N>
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{
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static bool apply(Point const& )
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{
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return false;
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}
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};
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} // namespace detail
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#endif // DOXYGEN_NO_DETAIL
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template <typename Point>
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bool has_nan_coordinate(Point const& point)
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{
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return detail::has_coordinate_with_property
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<
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Point,
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detail::isnan,
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std::is_floating_point
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<
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typename coordinate_type<Point>::type
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>::value
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>::apply(point);
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}
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_UTIL_HAS_NAN_COORDINATE_HPP
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