for_each_point.hpp

#pragma once

#include <mapbox/geometry/geometry.hpp>

namespace mapbox {
namespace geometry {

template <typename F>
void for_each_point(mapbox::geometry::empty const&, F&&)
{
}

template <typename Point, typename F>
auto for_each_point(Point&& point, F&& f)
    -> decltype(point.x, point.y, void())
{
    f(std::forward<Point>(point));
}

template <typename Container, typename F>
auto for_each_point(Container&& container, F&& f)
    -> decltype(container.begin(), container.end(), void());

template <typename... Types, typename F>
void for_each_point(mapbox::util::variant<Types...> const& geom, F&& f)
{
    mapbox::util::variant<Types...>::visit(geom, [&](auto const& g) {
        for_each_point(g, f);
    });
}

template <typename... Types, typename F>
void for_each_point(mapbox::util::variant<Types...>& geom, F&& f)
{
    mapbox::util::variant<Types...>::visit(geom, [&](auto& g) {
        for_each_point(g, f);
    });
}

template <typename Container, typename F>
auto for_each_point(Container&& container, F&& f)
    -> decltype(container.begin(), container.end(), void())
{
    for (auto& e : container)
    {
        for_each_point(e, f);
    }
}

} // namespace geometry
} // namespace mapbox