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133 lines
3.9 KiB
133 lines
3.9 KiB
// Boost.Geometry (aka GGL, Generic Geometry Library) |
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// Copyright (c) 2007-2011 Barend Gehrels, Amsterdam, the Netherlands. |
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// Copyright (c) 2008-2011 Bruno Lalande, Paris, France. |
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// Copyright (c) 2009-2011 Mateusz Loskot, London, UK. |
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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_MULTI_ALGORITHMS_CONVERT_HPP |
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#define BOOST_GEOMETRY_MULTI_ALGORITHMS_CONVERT_HPP |
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#include <boost/range/metafunctions.hpp> |
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#include <boost/geometry/algorithms/convert.hpp> |
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#include <boost/geometry/multi/core/tags.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 conversion |
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{ |
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template <typename Single, typename Multi, typename Policy> |
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struct single_to_multi |
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{ |
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static inline void apply(Single const& single, Multi& multi) |
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{ |
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traits::resize<Multi>::apply(multi, 1); |
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Policy::apply(single, *boost::begin(multi)); |
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} |
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}; |
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template <typename Multi1, typename Multi2, typename Policy> |
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struct multi_to_multi |
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{ |
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static inline void apply(Multi1 const& multi1, Multi2& multi2) |
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{ |
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traits::resize<Multi2>::apply(multi2, boost::size(multi1)); |
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typename boost::range_iterator<Multi1 const>::type it1 |
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= boost::begin(multi1); |
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typename boost::range_iterator<Multi2>::type it2 |
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= boost::begin(multi2); |
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for (; it1 != boost::end(multi1); ++it1, ++it2) |
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{ |
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Policy::apply(*it1, *it2); |
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} |
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} |
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}; |
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}} // namespace detail::convert |
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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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// Dispatch for multi <-> multi, specifying their single-version as policy. |
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// Note that, even if the multi-types are mutually different, their single |
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// version types might be the same and therefore we call boost::is_same again |
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template <std::size_t DimensionCount, typename Multi1, typename Multi2> |
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struct convert<false, multi_tag, multi_tag, DimensionCount, Multi1, Multi2> |
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: detail::conversion::multi_to_multi |
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< |
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Multi1, |
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Multi2, |
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convert |
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< |
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boost::is_same |
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< |
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typename boost::range_value<Multi1>::type, |
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typename boost::range_value<Multi2>::type |
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>::value, |
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typename single_tag_of |
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< |
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typename tag<Multi1>::type |
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>::type, |
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typename single_tag_of |
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< |
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typename tag<Multi2>::type |
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>::type, |
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DimensionCount, |
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typename boost::range_value<Multi1>::type, |
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typename boost::range_value<Multi2>::type |
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> |
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> |
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{}; |
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template <std::size_t DimensionCount, typename SingleTag, typename Single, typename Multi> |
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struct convert<false, SingleTag, multi_tag, DimensionCount, Single, Multi> |
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: detail::conversion::single_to_multi |
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< |
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Single, |
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Multi, |
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convert |
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< |
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false, |
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typename tag<Single>::type, |
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typename single_tag_of |
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< |
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typename tag<Multi>::type |
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>::type, |
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DimensionCount, |
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Single, |
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typename boost::range_value<Multi>::type |
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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 boost::geometry |
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#endif // BOOST_GEOMETRY_MULTI_ALGORITHMS_CONVERT_HPP
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