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https://github.com/mapnik/mapnik.git
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122 lines
3.5 KiB
C++
122 lines
3.5 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2025 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef MAPNIK_BOOST_SPIRIT_KARMA_ADAPTER_HPP
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#define MAPNIK_BOOST_SPIRIT_KARMA_ADAPTER_HPP
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// mapnik
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#include <mapnik/geometry.hpp>
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// stl
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#include <cstdint>
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namespace boost {
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using mapbox::util::get;
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}
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#include <boost/spirit/home/karma/domain.hpp>
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#include <boost/spirit/home/support/attributes.hpp>
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namespace boost {
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namespace spirit {
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namespace traits {
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template<>
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struct not_is_variant<mapnik::geometry::geometry<double>, karma::domain> : mpl::false_
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{};
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template<>
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struct not_is_variant<mapnik::geometry::geometry<std::int64_t>, karma::domain> : mpl::false_
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{};
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template<>
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struct variant_which<mapnik::geometry::geometry<double>>
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{
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static int call(mapnik::geometry::geometry<double> const& v) { return v.which(); }
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};
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template<>
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struct variant_which<mapnik::geometry::geometry<std::int64_t>>
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{
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static int call(mapnik::geometry::geometry<std::int64_t> const& v) { return v.which(); }
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};
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namespace detail {
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template<typename T, typename Tuple>
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struct has_type;
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template<typename T>
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struct has_type<T, std::tuple<>> : std::false_type
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{};
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template<typename T, typename U, typename... Types>
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struct has_type<T, std::tuple<U, Types...>> : has_type<T, std::tuple<Types...>>
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{};
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template<typename T, typename... Types>
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struct has_type<T, std::tuple<T, Types...>> : std::true_type
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{};
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template<typename T, typename Tuple>
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struct index;
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template<typename T, typename... Types>
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struct index<T, std::tuple<T, Types...>>
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{
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static std::size_t const value = 0;
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};
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template<typename T, typename U, typename... Types>
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struct index<T, std::tuple<U, Types...>>
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{
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static std::size_t const value = 1 + index<T, std::tuple<Types...>>::value;
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};
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} // namespace detail
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template<typename Expected>
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struct compute_compatible_component_variant<mapnik::geometry::geometry<double>, Expected>
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: detail::has_type<Expected, mapnik::geometry::geometry<double>::types>
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{
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using compatible_type = Expected;
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static bool is_compatible(int index)
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{
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return (index == detail::index<compatible_type, mapnik::geometry::geometry<double>::types>::value);
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}
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};
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template<typename Expected>
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struct compute_compatible_component_variant<mapnik::geometry::geometry<std::int64_t>, Expected>
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: detail::has_type<Expected, mapnik::geometry::geometry<std::int64_t>::types>
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{
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using compatible_type = Expected;
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static bool is_compatible(int index)
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{
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return (index == detail::index<compatible_type, mapnik::geometry::geometry<std::int64_t>::types>::value);
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}
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};
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} // namespace traits
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} // namespace spirit
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} // namespace boost
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#endif // MAPNIK_BOOST_SPIRIT_KARMA_ADAPTER_HPP
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