From 4f0ee254d4804c82bea061ea9d578435ab350bef Mon Sep 17 00:00:00 2001
From: kanschat <kanschat@0785d39b-7218-0410-832d-ea1e28bc413d>
Date: Tue, 13 May 2008 16:33:06 +0000
Subject: [PATCH] add assertion and clarify documentation

git-svn-id: https://svn.dealii.org/trunk@16088 0785d39b-7218-0410-832d-ea1e28bc413d
---
 deal.II/deal.II/include/multigrid/mg_tools.h     | 12 +++++++-----
 deal.II/deal.II/source/multigrid/mg_dof_tools.cc | 11 +++++++----
 2 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/deal.II/deal.II/include/multigrid/mg_tools.h b/deal.II/deal.II/include/multigrid/mg_tools.h
index cf89d0fffd..40de401816 100644
--- a/deal.II/deal.II/include/multigrid/mg_tools.h
+++ b/deal.II/deal.II/include/multigrid/mg_tools.h
@@ -2,7 +2,7 @@
 //    $Id$
 //    Version: $Name$
 //
-//    Copyright (C) 2005, 2006, 2007 by the deal.II authors
+//    Copyright (C) 2005, 2006, 2007, 2008 by the deal.II authors
 //
 //    This file is subject to QPL and may not be  distributed
 //    without copyright and license information. Please refer
@@ -227,13 +227,15 @@ class MGTools
 				      * but since the multilevel
 				      * method does not have its own
 				      * right hand side, the function
-				      * values are igneored.
+				      * values are ignored.
 				      *
 				      * @arg <tt>boundary_indices</tt>
-				      * is a vector which contains
-				      * for each level all indices of
+				      * is a vector which on return
+				      * contains all indices of
 				      * boundary constraint degrees of
-				      * freedom.
+				      * freedom for each level. Its
+				      * length has to match the number
+				      * of levels.
 				      */
     template <int dim>
     static void make_boundary_list(
diff --git a/deal.II/deal.II/source/multigrid/mg_dof_tools.cc b/deal.II/deal.II/source/multigrid/mg_dof_tools.cc
index 540b696168..40cc8022a7 100644
--- a/deal.II/deal.II/source/multigrid/mg_dof_tools.cc
+++ b/deal.II/deal.II/source/multigrid/mg_dof_tools.cc
@@ -2,7 +2,7 @@
 //    $Id$
 //    Version: $Name$
 //
-//    Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 by the deal.II authors
+//    Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by the deal.II authors
 //
 //    This file is subject to QPL and may not be  distributed
 //    without copyright and license information. Please refer
@@ -1124,10 +1124,13 @@ MGTools::make_boundary_list(
                                    // immediately
   if (function_map.size() == 0)
     return;
-  
-  const unsigned int        n_components = DoFTools::n_components(dof);
-  const bool                fe_is_system = (n_components != 1);
 
+  const unsigned int n_components = DoFTools::n_components(dof);
+  const unsigned int n_levels = dof.get_tria().n_levels();
+  const bool          fe_is_system = (n_components != 1);
+  
+  AssertDimension (boundary_indices.size(), n_levels);
+  
 //    for (typename FunctionMap<dim>::type::const_iterator i=function_map.begin();
 //         i!=function_map.end(); ++i)
 //      Assert (n_components == i->second->n_components,
-- 
2.39.5