upstream: container helper to remove using reverse iterator

src/common/container_helpers.h

@@ -167,4 +167,15 @@ void for_all_in_map_erase_if(std::unordered_map<KeyT, ValueT> &map_inout, PredT
     }
 }
 
+/// erase with a reverse iterator
+/// returned iterator is (pos + 1) if pos hadn't been erased
+template <typename ContainerT, typename ReverseIteratorT>
+ReverseIteratorT reverse_erase(ContainerT &container, ReverseIteratorT pos)
+{
+    static_assert(std::is_same_v<ReverseIteratorT, typename ContainerT::reverse_iterator>
+        || std::is_same_v<ReverseIteratorT, typename ContainerT::const_reverse_iterator>);
+
+    return ReverseIteratorT(container.erase((++pos).base()));
+}
+
 } //namespace tools