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Diffstat (limited to 'boost/geometry/util/has_nan_coordinate.hpp')
-rw-r--r-- | boost/geometry/util/has_nan_coordinate.hpp | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/boost/geometry/util/has_nan_coordinate.hpp b/boost/geometry/util/has_nan_coordinate.hpp new file mode 100644 index 0000000000..93d7c7f035 --- /dev/null +++ b/boost/geometry/util/has_nan_coordinate.hpp @@ -0,0 +1,99 @@ +// Boost.Geometry + +// Copyright (c) 2015 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 <boost/type_traits/is_floating_point.hpp> + +#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, + boost::is_floating_point + < + typename coordinate_type<Point>::type + >::value + >::apply(point); +} + +}} // namespace boost::geometry + +#endif // BOOST_GEOMETRY_UTIL_HAS_NAN_COORDINATE_HPP |