From d63f962a2131ac67500a24498541368f21dea5ba Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@math.tamu.edu>
Date: Mon, 17 Apr 2000 14:07:03 +0000
Subject: [PATCH] Add an assertion.

git-svn-id: https://svn.dealii.org/trunk@2733 0785d39b-7218-0410-832d-ea1e28bc413d
---
 deal.II/deal.II/source/dofs/dof_tools.cc | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/deal.II/deal.II/source/dofs/dof_tools.cc b/deal.II/deal.II/source/dofs/dof_tools.cc
index 1a7cceb263..dc8c1768af 100644
--- a/deal.II/deal.II/source/dofs/dof_tools.cc
+++ b/deal.II/deal.II/source/dofs/dof_tools.cc
@@ -755,6 +755,18 @@ DoFTools::compute_intergrid_constraints (const DoFHandler<dim>              &coa
 	  ==
 	  fine_fe.base_element (fine_fe.component_to_base(fine_component)),
 	  ExcFiniteElementsDontMatch());
+
+#ifdef DEBUG
+				   // if in debug mode, check whether
+				   // the coarse grid is indeed
+				   // coarser everywhere than the fine
+				   // grid
+  for (typename DoFHandler<dim>::active_cell_iterator cell=coarse_grid.begin_active();
+       cell != coarse_grid.end(); ++cell)
+    Assert (cell->level() <= coarse_to_fine_grid_map[cell]->level(),
+	    ExcGridNotCoarser());
+#endif
+
   
 
 /*
-- 
2.39.5