Renaming of CollectiveCommunication into Communication

dune/curvedgrid/gridfamily.hh

@@ -4,6 +4,7 @@
 #include <type_traits>
 
 #include <dune/common/referencehelper.hh>
+#include <dune/common/std/type_traits.hh>
 #include <dune/curvedgrid/capabilities.hh>
 #include <dune/curvedgrid/entity.hh>
 #include <dune/curvedgrid/entityseed.hh>
@@ -118,7 +119,15 @@ struct GridFamily
     using GlobalIdSet = Curved::IdSet<const Grid, typename HostGrid::Traits::GlobalIdSet>;
     using LocalIdSet = Curved::IdSet<const Grid, typename HostGrid::Traits::LocalIdSet>;
 
-    using CollectiveCommunication = typename HostGrid::Traits::CollectiveCommunication;
+    template <class T>
+    using CollectiveCommunication_t = typename T::CollectiveCommunication;
+    template <class T>
+    using Communication_t = typename T::Communication;
+
+    using CollectiveCommunication
+      = Dune::Std::detected_t<CollectiveCommunication_t, typename HostGrid::Traits>;
+    using Communication
+      = Dune::Std::detected_or_t<CollectiveCommunication, Communication_t, typename HostGrid::Traits>;
 
     // grid views
     using LeafGridView

dune/curvedgrid/gridview.hh

@@ -5,6 +5,7 @@
 #include <utility>
 
 #include <dune/common/referencehelper.hh>
+#include <dune/common/std/type_traits.hh>
 #include <dune/curvedgrid/datahandle.hh>
 #include <dune/curvedgrid/declaration.hh>
 #include <dune/curvedgrid/indexsets.hh>
@@ -50,7 +51,15 @@ public:
         Curved::IntersectionIterator<const Grid, HostIntersectionIterator>,
         Curved::Intersection<const Grid, HostIntersection>>;
 
-  using CollectiveCommunication = typename HostGridView::CollectiveCommunication;
+  template <class T>
+  using CollectiveCommunication_t = typename T::CollectiveCommunication;
+  template <class T>
+  using Communication_t = typename T::Communication;
+
+  using CollectiveCommunication
+    = Dune::Std::detected_t<CollectiveCommunication_t, HostGridView>;
+  using Communication
+    = Dune::Std::detected_or_t<CollectiveCommunication, Communication_t, HostGridView>;
 
   template <int codim>
   struct Codim