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