131 lines
3.5 KiB
C++
131 lines
3.5 KiB
C++
// Boost.Geometry Index
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//
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// R-tree iterators
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//
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// Copyright (c) 2011-2015 Adam Wulkiewicz, Lodz, Poland.
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//
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// This file was modified by Oracle on 2021.
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// Modifications copyright (c) 2021 Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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//
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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_INDEX_DETAIL_RTREE_ITERATORS_HPP
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#define BOOST_GEOMETRY_INDEX_DETAIL_RTREE_ITERATORS_HPP
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#include <iterator>
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#include <boost/geometry/index/detail/rtree/visitors/iterator.hpp>
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namespace boost { namespace geometry { namespace index { namespace detail { namespace rtree { namespace iterators {
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template <typename Value, typename Allocators>
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struct end_iterator
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{
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typedef std::forward_iterator_tag iterator_category;
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typedef Value value_type;
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typedef typename Allocators::const_reference reference;
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typedef typename Allocators::difference_type difference_type;
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typedef typename Allocators::const_pointer pointer;
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reference operator*() const
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{
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BOOST_GEOMETRY_INDEX_ASSERT(false, "iterator not dereferencable");
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pointer p(0);
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return *p;
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}
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const value_type * operator->() const
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{
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BOOST_GEOMETRY_INDEX_ASSERT(false, "iterator not dereferencable");
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const value_type * p = 0;
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return p;
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}
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end_iterator & operator++()
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{
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BOOST_GEOMETRY_INDEX_ASSERT(false, "iterator not incrementable");
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return *this;
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}
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end_iterator operator++(int)
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{
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BOOST_GEOMETRY_INDEX_ASSERT(false, "iterator not incrementable");
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return *this;
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}
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friend bool operator==(end_iterator const& /*l*/, end_iterator const& /*r*/)
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{
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return true;
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}
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};
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template <typename Value, typename Options, typename Translator, typename Box, typename Allocators>
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class iterator
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{
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typedef visitors::iterator<Value, Options, Translator, Box, Allocators> visitor_type;
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typedef typename visitor_type::node_pointer node_pointer;
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public:
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typedef std::forward_iterator_tag iterator_category;
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typedef Value value_type;
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typedef typename Allocators::const_reference reference;
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typedef typename Allocators::difference_type difference_type;
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typedef typename Allocators::const_pointer pointer;
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inline iterator()
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{}
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inline iterator(node_pointer root)
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{
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m_visitor.initialize(root);
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}
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reference operator*() const
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{
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return m_visitor.dereference();
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}
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const value_type * operator->() const
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{
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return boost::addressof(m_visitor.dereference());
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}
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iterator & operator++()
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{
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m_visitor.increment();
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return *this;
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}
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iterator operator++(int)
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{
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iterator temp = *this;
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this->operator++();
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return temp;
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}
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friend bool operator==(iterator const& l, iterator const& r)
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{
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return l.m_visitor == r.m_visitor;
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}
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friend bool operator==(iterator const& l, end_iterator<Value, Allocators> const& /*r*/)
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{
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return l.m_visitor.is_end();
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}
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friend bool operator==(end_iterator<Value, Allocators> const& /*l*/, iterator const& r)
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{
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return r.m_visitor.is_end();
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}
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private:
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visitor_type m_visitor;
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};
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}}}}}} // namespace boost::geometry::index::detail::rtree::iterators
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#endif // BOOST_GEOMETRY_INDEX_DETAIL_RTREE_ITERATORS_HPP
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