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