[disc][multidomain] Use discretization tag instead of enum as template argument.

dumux/multidomain/fvassembler.hh

@@ -104,41 +104,41 @@ private:
     using TimeLoop = TimeLoopBase<Scalar>;
     using ThisType = MultiDomainFVAssembler<MDTraits, CouplingManager, diffMethod, isImplicit()>;
 
-    template<DiscretizationMethod discMethod, std::size_t id>
+    template<class DiscretizationMethod, std::size_t id>
     struct SubDomainAssemblerType;
 
     template<std::size_t id>
-    struct SubDomainAssemblerType<DiscretizationMethod::cctpfa, id>
+    struct SubDomainAssemblerType<DiscretizationMethods::CCTpfa, id>
     {
         using type = SubDomainCCLocalAssembler<id, SubDomainTypeTag<id>, ThisType, diffMethod, isImplicit()>;
     };
 
     template<std::size_t id>
-    struct SubDomainAssemblerType<DiscretizationMethod::ccmpfa, id>
+    struct SubDomainAssemblerType<DiscretizationMethods::CCMpfa, id>
     {
         using type = SubDomainCCLocalAssembler<id, SubDomainTypeTag<id>, ThisType, diffMethod, isImplicit()>;
     };
 
     template<std::size_t id>
-    struct SubDomainAssemblerType<DiscretizationMethod::box, id>
+    struct SubDomainAssemblerType<DiscretizationMethods::Box, id>
     {
         using type = SubDomainBoxLocalAssembler<id, SubDomainTypeTag<id>, ThisType, diffMethod, isImplicit()>;
     };
 
     template<std::size_t id>
-    struct SubDomainAssemblerType<DiscretizationMethod::staggered, id>
+    struct SubDomainAssemblerType<DiscretizationMethods::Staggered, id>
     {
         using type = SubDomainStaggeredLocalAssembler<id, SubDomainTypeTag<id>, ThisType, diffMethod, isImplicit()>;
     };
 
     template<std::size_t id>
-    struct SubDomainAssemblerType<DiscretizationMethod::fcstaggered, id>
+    struct SubDomainAssemblerType<DiscretizationMethods::FCStaggered, id>
     {
         using type = SubDomainFaceCenteredLocalAssembler<id, SubDomainTypeTag<id>, ThisType, diffMethod, isImplicit()>;
     };
 
     template<std::size_t id>
-    using SubDomainAssembler = typename SubDomainAssemblerType<GridGeometry<id>::discMethod, id>::type;
+    using SubDomainAssembler = typename SubDomainAssemblerType<typename GridGeometry<id>::DiscretizationMethod, id>::type;
 
 public: