// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
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// Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
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// This file was modified by Oracle on 2020.
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// Modifications copyright (c) 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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// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
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// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
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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_ALGORITHMS_DETAIL_FOR_EACH_RANGE_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_FOR_EACH_RANGE_HPP
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#include <type_traits>
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#include <utility>
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#include <boost/concept/requires.hpp>
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#include <boost/core/addressof.hpp>
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#include <boost/range/begin.hpp>
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#include <boost/range/end.hpp>
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#include <boost/geometry/core/static_assert.hpp>
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#include <boost/geometry/core/tag.hpp>
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#include <boost/geometry/core/tag_cast.hpp>
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#include <boost/geometry/core/tags.hpp>
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#include <boost/geometry/util/type_traits.hpp>
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#include <boost/geometry/views/box_view.hpp>
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#include <boost/geometry/views/segment_view.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 { namespace for_each
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{
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template <typename Point>
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struct fe_range_point
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{
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template <typename Functor>
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static inline bool apply(Point& point, Functor&& f)
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{
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Point* ptr = boost::addressof(point);
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return f(std::pair<Point*, Point*>(ptr, ptr + 1));
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}
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};
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template <typename Segment>
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struct fe_range_segment
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{
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template <typename Functor>
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static inline bool apply(Segment& segment, Functor&& f)
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{
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return f(segment_view<typename std::remove_const<Segment>::type>(segment));
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}
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};
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template <typename Range>
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struct fe_range_range
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{
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template <typename Functor>
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static inline bool apply(Range& range, Functor&& f)
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{
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return f(range);
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}
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};
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template <typename Polygon>
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struct fe_range_polygon
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{
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template <typename Functor>
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static inline bool apply(Polygon& polygon, Functor&& f)
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{
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return f(exterior_ring(polygon));
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// TODO: If some flag says true, also do the inner rings.
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// for convex hull, it's not necessary
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}
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};
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template <typename Box>
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struct fe_range_box
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{
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template <typename Functor>
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static inline bool apply(Box& box, Functor&& f)
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{
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return f(box_view<typename std::remove_const<Box>::type>(box));
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}
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};
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template <typename Multi, typename SinglePolicy>
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struct fe_range_multi
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{
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template <typename Functor>
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static inline bool apply(Multi& multi, Functor&& f)
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{
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auto const end = boost::end(multi);
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for (auto it = boost::begin(multi); it != end; ++it)
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{
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if (! SinglePolicy::apply(*it, f))
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{
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return false;
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}
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}
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return true;
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}
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};
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}} // namespace detail::for_each
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#endif // DOXYGEN_NO_DETAIL
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#ifndef DOXYGEN_NO_DISPATCH
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namespace dispatch
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{
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template
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<
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typename Geometry,
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typename Tag = typename tag<Geometry>::type
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>
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struct for_each_range
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{
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BOOST_GEOMETRY_STATIC_ASSERT_FALSE(
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"Not or not yet implemented for this Geometry type.",
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Geometry, Tag);
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};
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template <typename Point>
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struct for_each_range<Point, point_tag>
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: detail::for_each::fe_range_point<Point>
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{};
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template <typename Segment>
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struct for_each_range<Segment, segment_tag>
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: detail::for_each::fe_range_segment<Segment>
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{};
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template <typename Linestring>
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struct for_each_range<Linestring, linestring_tag>
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: detail::for_each::fe_range_range<Linestring>
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{};
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template <typename Ring>
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struct for_each_range<Ring, ring_tag>
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: detail::for_each::fe_range_range<Ring>
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{};
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template <typename Polygon>
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struct for_each_range<Polygon, polygon_tag>
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: detail::for_each::fe_range_polygon<Polygon>
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{};
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template <typename Box>
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struct for_each_range<Box, box_tag>
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: detail::for_each::fe_range_box<Box>
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{};
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template <typename MultiPoint>
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struct for_each_range<MultiPoint, multi_point_tag>
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: detail::for_each::fe_range_range<MultiPoint>
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{};
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template <typename Geometry>
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struct for_each_range<Geometry, multi_linestring_tag>
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: detail::for_each::fe_range_multi
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<
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Geometry,
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detail::for_each::fe_range_range
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<
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util::transcribe_const_t
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<
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Geometry,
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typename boost::range_value<Geometry>::type
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>
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>
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>
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{};
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template <typename Geometry>
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struct for_each_range<Geometry, multi_polygon_tag>
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: detail::for_each::fe_range_multi
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<
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Geometry,
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detail::for_each::fe_range_polygon
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<
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util::transcribe_const_t
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<
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Geometry,
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typename boost::range_value<Geometry>::type
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>
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>
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>
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{};
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} // namespace dispatch
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#endif // DOXYGEN_NO_DISPATCH
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namespace detail
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{
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// Currently for Polygons p is checked only for exterior ring
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// Should this function be renamed?
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template <typename Geometry, typename UnaryPredicate>
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inline bool all_ranges_of(Geometry const& geometry, UnaryPredicate p)
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{
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return dispatch::for_each_range<Geometry const>::apply(geometry, p);
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}
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// Currently for Polygons p is checked only for exterior ring
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// Should this function be renamed?
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template <typename Geometry, typename UnaryPredicate>
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inline bool any_range_of(Geometry const& geometry, UnaryPredicate p)
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{
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return ! dispatch::for_each_range<Geometry const>::apply(geometry,
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[&](auto&& range)
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{
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return ! p(range);
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});
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}
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// Currently for Polygons p is checked only for exterior ring
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// Should this function be renamed?
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template <typename Geometry, typename UnaryPredicate>
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inline bool none_range_of(Geometry const& geometry, UnaryPredicate p)
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{
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return dispatch::for_each_range<Geometry const>::apply(geometry,
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[&](auto&& range)
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{
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return ! p(range);
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});
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}
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// Currently for Polygons f is called only for exterior ring
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// Should this function be renamed?
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template <typename Geometry, typename Functor>
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inline Functor for_each_range(Geometry const& geometry, Functor f)
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{
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dispatch::for_each_range<Geometry const>::apply(geometry,
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[&](auto&& range)
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{
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f(range);
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// TODO: Implement separate function?
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return true;
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});
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return f;
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}
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}
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_FOR_EACH_RANGE_HPP
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