[examples] Disable poisson-adaptive for dune-funcions < 2.11

The examples requires a fix that is not contained in 2.10
and makes composed grid functions work with bound unary
operators.

examples/CMakeLists.txt

@@ -4,8 +4,10 @@ dune_target_enable_all_packages(hyperelasticity)
 add_executable("linear-elasticity" linear-elasticity.cc)
 dune_target_enable_all_packages(linear-elasticity)
 
-add_executable("poisson-adaptive" poisson-adaptive.cc)
-dune_target_enable_all_packages(poisson-adaptive)
+if(dune-functions_VERSION VERSION_GREATER_EQUAL 2.11.0)
+  add_executable("poisson-adaptive" poisson-adaptive.cc)
+  dune_target_enable_all_packages(poisson-adaptive)
+endif()
 
 add_executable("poisson-pq2" poisson-pq2.cc)
 dune_target_enable_all_packages(poisson-pq2)

examples/poisson-adaptive.cc

@@ -8,7 +8,6 @@
 #include <tuple>
 
 #include <dune/common/bitsetvector.hh>
-#include <dune/common/version.hh>
 #include <dune/common/stringutility.hh>
 
 #include <dune/geometry/quadraturerules.hh>
@@ -30,12 +29,8 @@
 #include <dune/functions/gridfunctions/composedgridfunction.hh>
 #include <dune/functions/gridfunctions/gridviewfunction.hh>
 
-#if DUNE_VERSION_GT(DUNE_VTK, 2, 9)
 #include <dune/vtk/vtkwriter.hh>
 #include <dune/vtk/datacollectors/lagrangedatacollector.hh>
-#else
-#include <dune/grid/io/file/vtk/subsamplingvtkwriter.hh>
-#endif
 
 #include <dune/fufem/logger.hh>
 #include <dune/fufem/parallel/elementcoloring.hh>
@@ -320,14 +315,10 @@ int main (int argc, char *argv[]) try
     // *********************************************
 
     // Disable parallel assembly for UGGrid before 2.10
-#if DUNE_VERSION_GT(DUNE_FUNCTIONS, 2, 9)
     auto gridViewPartition = Dune::Fufem::coloredGridViewPartition(basis.gridView());
     log("Grid coloring computed");
 
     auto globalAssembler = GlobalAssembler(basis, basis, 0, std::cref(gridViewPartition), threadCount);
-#else
-    auto globalAssembler = GlobalAssembler(basis, basis, 0);
-#endif
 
     {
       using namespace ::Dune::Fufem::Forms;
@@ -436,11 +427,7 @@ int main (int argc, char *argv[]) try
       };
 
       // Compute local error estimates
-#if DUNE_VERSION_GT(DUNE_FUNCTIONS, 2, 9)
       auto [error, eta] = hierarchicalErrorEstimator(a, residual, extensionBasis, extensionConstraints, defect, std::cref(gridViewPartition), threadCount);
-#else
-      auto [error, eta] = hierarchicalErrorEstimator(a, residual, extensionBasis, extensionConstraints, defect);
-#endif
 
       log(Dune::formatString("Estimated total error :    % 12.5e", error));
 
@@ -451,7 +438,6 @@ int main (int argc, char *argv[]) try
       {
         auto u_initial = bindToCoefficients(trialFunction(basis), sol_initial);
         auto d = bindToCoefficients(trialFunction(extensionBasis), defect);
-#if DUNE_VERSION_GT(DUNE_VTK, 2, 9)
         using Dune::Vtk::LagrangeDataCollector;
         using Dune::Vtk::UnstructuredGridWriter;
         using Dune::VTK::FieldInfo;
@@ -460,12 +446,6 @@ int main (int argc, char *argv[]) try
         vtkWriter.addPointData(u_initial, FieldInfo("sol_initial", FieldInfo::Type::scalar, 1));
         vtkWriter.addPointData(d, FieldInfo("defect", FieldInfo::Type::scalar, 1));
         vtkWriter.write(Dune::formatString("poisson-adaptive-%03d", refinementStep));
-#else
-        Dune::SubsamplingVTKWriter<GridView> vtkWriter(gridView, Dune::refinementLevels(1));
-        vtkWriter.addVertexData(u, VTK::FieldInfo("sol", VTK::FieldInfo::Type::scalar, 1));
-        vtkWriter.addVertexData(d, VTK::FieldInfo("defect", VTK::FieldInfo::Type::scalar, 1));
-        vtkWriter.write(Dune::formatString("poisson-adaptive-%03d", refinementStep));
-#endif
         log("Solution written to vtk file");
       }