136 lines
4.1 KiB
C++
136 lines
4.1 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2007-2014 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2008-2014 Bruno Lalande, Paris, France.
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// Copyright (c) 2009-2014 Mateusz Loskot, London, UK.
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// Copyright (c) 2013-2014 Adam Wulkiewicz, Lodz, Poland.
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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 Menelaos Karavelas, on behalf of Oracle
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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_ALGORITHMS_DISPATCH_DISTANCE_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_DISPATCH_DISTANCE_HPP
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#include <boost/geometry/algorithms/not_implemented.hpp>
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#include <boost/geometry/core/reverse_dispatch.hpp>
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#include <boost/geometry/core/tag.hpp>
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#include <boost/geometry/core/tag_cast.hpp>
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#include <boost/geometry/core/tags.hpp>
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#include <boost/geometry/strategies/detail.hpp>
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#include <boost/geometry/strategies/distance.hpp>
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#include <boost/geometry/strategies/distance/services.hpp>
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namespace boost { namespace geometry
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{
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#ifndef DOXYGEN_NO_DISPATCH
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namespace dispatch
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{
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template
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<
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typename Geometry1, typename Geometry2, typename Strategies,
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bool IsUmbrella = strategies::detail::is_umbrella_strategy<Strategies>::value,
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bool Reverse = reverse_dispatch<Geometry1, Geometry2>::value
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>
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struct distance_strategy_type
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{
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typedef decltype(std::declval<Strategies>().distance(std::declval<Geometry1>(), std::declval<Geometry2>())) type;
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};
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// TODO: right now legacy single strategy can be passed here in some cases
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// so for now dispatch also by IsUmbrella. Later this could be removed.
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template <typename Geometry1, typename Geometry2, typename Strategy, bool Reverse>
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struct distance_strategy_type<Geometry1, Geometry2, Strategy, false, Reverse>
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{
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typedef Strategy type;
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};
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template <typename Geometry1, typename Geometry2, typename Strategies>
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struct distance_strategy_type<Geometry1, Geometry2, Strategies, true, true>
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: distance_strategy_type<Geometry2, Geometry1, Strategies, true, false>
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{};
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template
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<
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typename Geometry1, typename Geometry2, typename Strategies,
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bool IsDynamicOrGC = util::is_dynamic_geometry<Geometry1>::value
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|| util::is_dynamic_geometry<Geometry2>::value
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|| util::is_geometry_collection<Geometry1>::value
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|| util::is_geometry_collection<Geometry2>::value
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>
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struct distance_strategy_tag
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{
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using type = void;
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};
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template <typename Geometry1, typename Geometry2, typename Strategies>
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struct distance_strategy_tag<Geometry1, Geometry2, Strategies, false>
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{
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using type = typename strategy::distance::services::tag
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<
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typename distance_strategy_type<Geometry1, Geometry2, Strategies>::type
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>::type;
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};
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template
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<
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typename Geometry1, typename Geometry2,
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typename Strategy = typename strategies::distance::services::default_strategy
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<
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Geometry1, Geometry2
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>::type,
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typename Tag1 = typename tag_cast
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<
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typename tag<Geometry1>::type,
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segment_tag,
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box_tag,
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linear_tag,
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areal_tag
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>::type,
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typename Tag2 = typename tag_cast
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<
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typename tag<Geometry2>::type,
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segment_tag,
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box_tag,
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linear_tag,
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areal_tag
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>::type,
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typename StrategyTag = typename distance_strategy_tag
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<
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Geometry1, Geometry2, Strategy
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>::type,
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bool Reverse = reverse_dispatch<Geometry1, Geometry2>::value
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>
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struct distance : not_implemented<Tag1, Tag2>
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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_ALGORITHMS_DISPATCH_DISTANCE_HPP
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