#pragma once #include <mapbox/geometry/geometry.hpp> #include <mapbox/variant.hpp> #include <cstdint> #include <string> #include <vector> #include <unordered_map> #include <experimental/optional> namespace mapbox { namespace geometry { struct value; struct null_value_t { constexpr null_value_t() {} constexpr null_value_t(std::nullptr_t) {} }; constexpr bool operator==(const null_value_t&, const null_value_t&) { return true; } constexpr bool operator!=(const null_value_t&, const null_value_t&) { return false; } constexpr null_value_t null_value = null_value_t(); // Multiple numeric types (uint64_t, int64_t, double) are present in order to support // the widest possible range of JSON numbers, which do not have a maximum range. // Implementations that produce `value`s should use that order for type preference, // using uint64_t for positive integers, int64_t for negative integers, and double // for non-integers and integers outside the range of 64 bits. using value_base = mapbox::util::variant<null_value_t, bool, uint64_t, int64_t, double, std::string, mapbox::util::recursive_wrapper<std::vector<value>>, mapbox::util::recursive_wrapper<std::unordered_map<std::string, value>>>; struct value : value_base { using value_base::value_base; }; using property_map = std::unordered_map<std::string, value>; // The same considerations and requirement for numeric types apply as for `value_base`. using identifier = mapbox::util::variant<uint64_t, int64_t, double, std::string>; template <class T> struct feature { using coordinate_type = T; using geometry_type = mapbox::geometry::geometry<T>; // Fully qualified to avoid GCC -fpermissive error. geometry_type geometry; property_map properties {}; std::experimental::optional<identifier> id {}; }; template <class T> constexpr bool operator==(feature<T> const& lhs, feature<T> const& rhs) { return lhs.id == rhs.id && lhs.geometry == rhs.geometry && lhs.properties == rhs.properties; } template <class T> constexpr bool operator!=(feature<T> const& lhs, feature<T> const& rhs) { return !(lhs == rhs); } template <class T, template <typename...> class Cont = std::vector> struct feature_collection : Cont<feature<T>> { using coordinate_type = T; using feature_type = feature<T>; using container_type = Cont<feature_type>; using container_type::container_type; }; } // namespace geometry } // namespace mapbox