[functors] implement mandatory copy function

dune/xt/grid/functors/boundary-detector.hh

@@ -72,6 +72,11 @@ public:
     return found_;
   }
 
+  BaseType* copy() override
+  {
+    return new BoundaryDetectorFunctor<GL>(*this);
+  }
+
 private:
   const BoundaryInfo<IntersectionType>& boundary_info_;
   const std::shared_ptr<BoundaryType> boundary_type_;

dune/xt/grid/functors/bounding-box.hh

@@ -48,6 +48,11 @@ struct MinMaxCoordinateFunctor : public ElementFunctor<GridViewType>
     }
   }
 
+  ElementFunctor<GridViewType>* copy() override
+  {
+    return new MinMaxCoordinateFunctor<GridViewType>(*this);
+  }
+
   VectorType minima_;
   VectorType maxima_;
 };

dune/xt/grid/functors/lambda.hh

@@ -55,6 +55,11 @@ public:
     finalize_lambda_();
   }
 
+  BaseType* copy() override
+  {
+    return new ElementLambdaFunctor<GL>(*this);
+  }
+
 private:
   const ApplyLambdaType apply_lambda_;
   const PrepareLambdaType prepare_lambda_;
@@ -102,6 +107,11 @@ public:
     finalize_lambda_();
   }
 
+  BaseType* copy() override
+  {
+    return new IntersectionLambdaFunctor(*this);
+  }
+
 private:
   const ApplyLambdaType apply_lambda_;
   const PrepareLambdaType prepare_lambda_;
@@ -157,6 +167,11 @@ public:
     finalize_lambda_();
   }
 
+  BaseType* copy() override
+  {
+    return new ElementAndIntersectionLambdaFunctor<GL>(*this);
+  }
+
 private:
   const ElementApplyLambdaType element_apply_lambda_;
   const IntersectionApplyLambdaType intersection_apply_lambda_;

dune/xt/grid/functors/refinement.hh

@@ -41,6 +41,11 @@ struct MaximumEntityVolumeRefineFunctor : public ElementFunctor<GridViewType>
       grid_.mark(1, element);
   }
 
+  ElementFunctor<GridViewType>* copy() override
+  {
+    return new MaximumEntityVolumeRefineFunctor<GridViewType>(*this);
+  }
+
   const double threshold_volume_;
   GridType& grid_;
 };

dune/xt/grid/information.hh

@@ -139,6 +139,11 @@ struct Dimensions
           coord_limits_[k](corner[k]);
       }
     } // ()
+
+    ElementFunctor<GridLayerType>* copy() override
+    {
+      return new GridDimensionsFunctor(*this);
+    }
   };
 
   double volume_relation() const

dune/xt/grid/output/pgf.hh

@@ -137,6 +137,11 @@ public:
     file_.flush();
   }
 
+  BaseType* copy() override
+  {
+    return new PgfEntityFunctorIntersections<GridViewType>(*this);
+  }
+
   void maybePrintEntityIndex(const typename BaseType::ElementType& entity, const int idx)
   {
     if (!print_entityIndex_)
@@ -206,6 +211,12 @@ public:
     this->file_.flush();
   }
 
+  ElementAndIntersectionFunctor<GridViewType>* copy() override
+  {
+    return new PgfEntityFunctorIntersectionsWithShift<GridViewType>(*this);
+  }
+
+
 private:
   const int level_;
 };