Merge branch 'issue/neumann_example' into 'master'

reduct compile time in neumann example

See merge request !191

examples/neumann.cc

@@ -16,6 +16,8 @@
 #include <amdis/ProblemStat.hpp>
 #include <amdis/LocalOperators.hpp>
 
+#define GRID_ID 3
+
 using namespace AMDiS;
 
 template <class Grid>
@@ -51,18 +53,19 @@ int main(int argc, char** argv)
 {
   Environment env(argc, argv);
 
+#if GRID_ID == 0
   // 2d grids
-
   Dune::YaspGrid<2> grid0({1.0,1.0},{2,2});
   run(grid0);
+#endif
 
-#if HAVE_DUNE_SPGRID
+#if GRID_ID == 1 && HAVE_DUNE_SPGRID
   Dune::SPDomain<double,2> domain({0.0,0.0}, {1.0,1.0});
   Dune::SPGrid<double,2> grid1(domain, Dune::SPMultiIndex<2>({2,2}));
   run(grid1);
 #endif
 
-#if HAVE_DUNE_ALUGRID
+#if GRID_ID == 2 && HAVE_DUNE_ALUGRID
   using Grid2 = Dune::ALUGrid<2,2,Dune::simplex,Dune::conforming>;
   using Factory2 = Dune::StructuredGridFactory<Grid2>;
   auto grid2 = Factory2::createSimplexGrid({0.0,0.0}, {1.0,1.0},
@@ -70,7 +73,7 @@ int main(int argc, char** argv)
   run(*grid2);
 #endif
 
-#if HAVE_DUNE_UGGRID
+#if GRID_ID == 3 && HAVE_DUNE_UGGRID
   using Grid3 = Dune::UGGrid<2>;
   using Factory3 = Dune::StructuredGridFactory<Grid3>;
   auto grid3 = Factory3::createSimplexGrid({0.0,0.0}, {1.0,1.0},
@@ -78,10 +81,11 @@ int main(int argc, char** argv)
   run(*grid3);
 #endif
 
+#if GRID_ID == 4
   // 3d grids
-
   Dune::YaspGrid<3> grid4({1.0,1.0,1.0},{2,2,2});
   run(grid4);
+#endif
 
   return 0;
 }