85 lines
1.9 KiB
C++
85 lines
1.9 KiB
C++
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// Boost.Geometry
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// Copyright (c) 2022, Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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// Licensed under the Boost Software License version 1.0.
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// http://www.boost.org/users/license.html
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#ifndef BOOST_GEOMETRY_VIEWS_GEOMETRY_COLLECTION_VIEW_HPP
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#define BOOST_GEOMETRY_VIEWS_GEOMETRY_COLLECTION_VIEW_HPP
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#include <boost/core/addressof.hpp>
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#include <boost/geometry/core/geometry_types.hpp>
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#include <boost/geometry/core/tag.hpp>
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#include <boost/geometry/core/tags.hpp>
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#include <boost/geometry/core/visit.hpp>
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#include <boost/geometry/util/sequence.hpp>
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namespace boost { namespace geometry
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{
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namespace detail
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{
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template <typename Geometry>
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class geometry_collection_view
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{
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public:
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using iterator = Geometry const*;
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using const_iterator = Geometry const*;
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explicit geometry_collection_view(Geometry const& geometry)
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: m_geometry(geometry)
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{}
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const_iterator begin() const { return boost::addressof(m_geometry); }
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const_iterator end() const { return boost::addressof(m_geometry) + 1; }
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private:
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Geometry const& m_geometry;
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};
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} // namespace detail
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#ifndef DOXYGEN_NO_TRAITS_SPECIALIZATIONS
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namespace traits
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{
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template <typename Geometry>
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struct tag<geometry::detail::geometry_collection_view<Geometry>>
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{
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using type = geometry_collection_tag;
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};
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template <typename Geometry>
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struct geometry_types<geometry::detail::geometry_collection_view<Geometry>>
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{
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using type = util::type_sequence<Geometry>;
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};
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template <typename Geometry>
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struct iter_visit<geometry::detail::geometry_collection_view<Geometry>>
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{
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template <typename Function, typename Iterator>
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static void apply(Function && function, Iterator iterator)
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{
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function(*iterator);
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}
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};
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} // namespace traits
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#endif // DOXYGEN_NO_TRAITS_SPECIALIZATIONS
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_VIEWS_GEOMETRY_COLLECTION_VIEW_HPP
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