1 files changed, 23 insertions, 0 deletions
diff --git a/boost/geometry/algorithms/detail/buffer/buffered_ring.hpp b/boost/geometry/algorithms/detail/buffer/buffered_ring.hpp
index 29a618b923..db6136e1ae 100644
--- a/boost/geometry/algorithms/detail/buffer/buffered_ring.hpp
+++ b/boost/geometry/algorithms/detail/buffer/buffered_ring.hpp
@@ -149,6 +149,14 @@ struct ring_type
 
 }
 
+
+template <>
+struct single_tag_of<detail::buffer::buffered_ring_collection_tag>
+{
+    typedef ring_tag type;
+};
+
+
 namespace dispatch
 {
 
@@ -213,6 +221,21 @@ struct within
 };
 
 
+template <typename Geometry>
+struct is_empty<Geometry, detail::buffer::buffered_ring_collection_tag>
+    : detail::is_empty::multi_is_empty<detail::is_empty::range_is_empty>
+{};
+
+
+template <typename Geometry>
+struct envelope<Geometry, detail::buffer::buffered_ring_collection_tag>
+    : detail::envelope::envelope_multi_range
+        <
+            detail::envelope::envelope_range
+        >
+{};
+
+
 } // namespace dispatch
 
 namespace detail { namespace overlay