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65 lines
1.8 KiB
C++
65 lines
1.8 KiB
C++
2 years ago
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// Boost.Geometry
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// 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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// 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_ALGORITHS_DETAIL_DISTANCE_STRATEGY_UTILS_HPP
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#define BOOST_GEOMETRY_ALGORITHS_DETAIL_DISTANCE_STRATEGY_UTILS_HPP
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#include <utility>
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#include <boost/geometry/core/point_type.hpp>
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#include <boost/geometry/strategies/distance.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 distance
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{
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template <typename Geometry1, typename Geometry2, typename Strategies>
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using strategy_t = decltype(
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std::declval<Strategies>().distance(std::declval<Geometry1>(), std::declval<Geometry2>()));
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template <typename Geometry1, typename Geometry2, typename Strategies>
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using return_t = typename strategy::distance::services::return_type
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<
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strategy_t<Geometry1, Geometry2, Strategies>,
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typename point_type<Geometry1>::type,
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typename point_type<Geometry2>::type
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>::type;
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template <typename Geometry1, typename Geometry2, typename Strategies>
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using cstrategy_t = typename strategy::distance::services::comparable_type
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<
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strategy_t<Geometry1, Geometry2, Strategies>
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>::type;
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template <typename Geometry1, typename Geometry2, typename Strategies>
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using creturn_t = typename strategy::distance::services::return_type
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<
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cstrategy_t<Geometry1, Geometry2, Strategies>,
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typename point_type<Geometry1>::type,
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typename point_type<Geometry2>::type
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>::type;
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}} // namespace detail::distance
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#endif // DOXYGEN_NO_DETAIL
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_ALGORITHS_DETAIL_DISTANCE_STRATEGY_UTILS_HPP
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