corrected pipline errors

.gitlab-ci.yml

@@ -4,6 +4,8 @@ before_script:
   - duneci-install-module https://gitlab.dune-project.org/core/dune-common.git
   - duneci-install-module https://gitlab.dune-project.org/core/dune-geometry.git
   - duneci-install-module https://gitlab.dune-project.org/core/dune-grid.git
+  - duneci-install-module https://gitlab.dune-project.org/staging/dune-function.git
+  - duneci-install-module https://gitlab.dune-project.org/extensions/dune-alugrid.git
 
 debian:10 gcc-8-noassert-17:
   image: registry.dune-project.org/docker/ci/debian:10

src/hierarchiciterator.cc

@@ -4,6 +4,8 @@
 # include "config.h"
 #endif
 
+#if DUNE_HAVE_CXX_VARIANT
+
 #include <iostream>
 #include <dune/common/parallel/mpihelper.hh> // An initializer of MPI
 #include <dune/common/exceptions.hh> // We use exceptions
@@ -53,6 +55,7 @@ int main(int argc, char** argv)
   grid.globalRefine(4);
 
   printGrid(grid.levelGridView(2), grid.leafGridView());
-
 #endif
 }
+
+#endif // DUNE_HAVE_CXX_VARIANT
\ No newline at end of file

src/multigridview.cc

@@ -4,6 +4,8 @@
 # include "config.h"
 #endif
 
+#if DUNE_HAVE_CXX_VARIANT
+
 #include <iostream>
 #include <dune/common/parallel/mpihelper.hh> // An initializer of MPI
 #include <dune/common/exceptions.hh> // We use exceptions
@@ -73,3 +75,7 @@ int main(int argc, char** argv)
 
 #endif
 }
+
+#else // DUNE_HAVE_CXX_VARIANT
+int main() {}
+#endif // DUNE_HAVE_CXX_VARIANT