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-rw-r--r--include/mapbox/geometry/for_each_point.hpp45
1 files changed, 45 insertions, 0 deletions
diff --git a/include/mapbox/geometry/for_each_point.hpp b/include/mapbox/geometry/for_each_point.hpp
new file mode 100644
index 0000000..44d6e77
--- /dev/null
+++ b/include/mapbox/geometry/for_each_point.hpp
@@ -0,0 +1,45 @@
+#pragma once
+
+#include <mapbox/geometry/geometry.hpp>
+
+namespace mapbox {
+namespace geometry {
+
+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