From 1ce4c90c9a38a1bce086e53348d39de8ab21e14c Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@math.tamu.edu>
Date: Tue, 30 Oct 2012 13:05:57 +0000
Subject: [PATCH] Add a bunch of assertions to kill invalid behavior as early
 as possible (currently we get some really weird follow-up errors deep down in
 the machinery.

git-svn-id: https://svn.dealii.org/trunk@27234 0785d39b-7218-0410-832d-ea1e28bc413d
---
 .../deal.II/dofs/dof_accessor.templates.h     | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/deal.II/include/deal.II/dofs/dof_accessor.templates.h b/deal.II/include/deal.II/dofs/dof_accessor.templates.h
index cefac603cc..9dd7fc8122 100644
--- a/deal.II/include/deal.II/dofs/dof_accessor.templates.h
+++ b/deal.II/include/deal.II/dofs/dof_accessor.templates.h
@@ -1477,6 +1477,11 @@ inline
 unsigned int
 DoFAccessor<dim,DH>::n_active_fe_indices () const
 {
+  if (dim == DH::dimension)
+    Assert (this->active(),
+	    ExcMessage ("You can't query information about active FE indices on "
+			"cells that have children and are therefore not active."));
+
                                    // access the respective DoF
   return
     dealii::internal::DoFAccessor::Implementation::
@@ -1493,6 +1498,11 @@ inline
 unsigned int
 DoFAccessor<dim,DH>::nth_active_fe_index (const unsigned int n) const
 {
+  if (dim == DH::dimension)
+    Assert (this->active(),
+	    ExcMessage ("You can't query information about active FE indices on "
+			"cells that have children and are therefore not active."));
+
                                    // access the respective DoF
   return
     dealii::internal::DoFAccessor::Implementation::
@@ -1510,6 +1520,11 @@ inline
 bool
 DoFAccessor<dim,DH>::fe_index_is_active (const unsigned int fe_index) const
 {
+  if (dim == DH::dimension)
+    Assert (this->active(),
+	    ExcMessage ("You can't query information about active FE indices on "
+			"cells that have children and are therefore not active."));
+
                                    // access the respective DoF
   return
     dealii::internal::DoFAccessor::Implementation::
@@ -3299,6 +3314,10 @@ inline
 unsigned int
 DoFCellAccessor<DH>::active_fe_index () const
 {
+  Assert (this->active(),
+	  ExcMessage ("You can't query information about active FE indices on "
+		      "cells that have children and are therefore not active."));
+
   return dealii::internal::DoFCellAccessor::Implementation::active_fe_index (*this);
 }
 
@@ -3309,6 +3328,10 @@ inline
 void
 DoFCellAccessor<DH>::set_active_fe_index (const unsigned int i)
 {
+  Assert (this->active(),
+	  ExcMessage ("You can't query information about active FE indices on "
+		      "cells that have children and are therefore not active."));
+
   dealii::internal::DoFCellAccessor::Implementation::set_active_fe_index (*this, i);
 }
 
-- 
2.39.5