99 lines
2.9 KiB
C++
99 lines
2.9 KiB
C++
// 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 2014-2021.
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// Modifications copyright (c) 2014-2021 Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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// 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_VIEWS_DETAIL_CLOSED_CLOCKWISE_VIEW_HPP
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#define BOOST_GEOMETRY_VIEWS_DETAIL_CLOSED_CLOCKWISE_VIEW_HPP
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#include <type_traits>
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#include <boost/range/begin.hpp>
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#include <boost/range/end.hpp>
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#include <boost/range/iterator.hpp>
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#include <boost/geometry/views/closeable_view.hpp>
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#include <boost/geometry/views/reversible_view.hpp>
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#include <boost/geometry/util/order_as_direction.hpp>
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#include <boost/geometry/util/type_traits_std.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
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{
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template
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<
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typename Range,
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closure_selector Closure = geometry::closure<Range>::value,
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order_selector Order = geometry::point_order<Range>::value
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>
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struct closed_clockwise_view
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{
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using closed_view = detail::closed_view<Range const, Closure>;
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using view = detail::clockwise_view<closed_view const, Order>;
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explicit inline closed_clockwise_view(Range const& r)
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: m_view(closed_view(r))
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{}
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using iterator = typename boost::range_iterator<view const>::type;
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using const_iterator = typename boost::range_iterator<view const>::type;
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inline const_iterator begin() const { return boost::begin(m_view); }
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inline const_iterator end() const { return boost::end(m_view); }
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private:
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view m_view;
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};
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} // namespace detail
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#endif // DOXYGEN_NO_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 Range, closure_selector Closure, order_selector Order>
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struct tag<detail::closed_clockwise_view<Range, Closure, Order> >
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: geometry::tag<Range>
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{};
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template <typename Range, closure_selector Closure, order_selector Order>
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struct point_order<detail::closed_clockwise_view<Range, Closure, Order> >
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{
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static const order_selector value = clockwise;
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};
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template <typename Range, closure_selector Closure, order_selector Order>
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struct closure<detail::closed_clockwise_view<Range, Closure, Order> >
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{
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static const closure_selector value = closed;
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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_DETAIL_CLOSED_CLOCKWISE_VIEW_HPP
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