--- /dev/null
+//---------------------------- sparse_matrix_iterator_12.cc ---------------------------
+// $Id$
+// Version: $Name$
+//
+// Copyright (C) 2004, 2005 by the deal.II authors
+//
+// This file is subject to QPL and may not be distributed
+// without copyright and license information. Please refer
+// to the file deal.II/doc/license.html for the text and
+// further information on this license.
+//
+//---------------------------- sparse_matrix_iterator_12.cc ---------------------------
+
+
+// like sparse_matrix_iterator_11, but for const_iterators
+
+#include "../tests.h"
+#include <lac/sparsity_pattern.h>
+#include <lac/sparse_matrix.h>
+#include <fstream>
+#include <iostream>
+
+
+void test ()
+{
+ // create a sparsity pattern with totally
+ // empty lines (not even diagonals, since
+ // not quadratic)
+ SparsityPattern sparsity(4,5,1);
+ sparsity.add (1,1);
+ sparsity.add (3,1);
+ sparsity.compress ();
+
+ // attach a sparse matrix to it
+ SparseMatrix<double> A(sparsity);
+
+ SparseMatrix<double>::const_iterator k = A.begin(),
+ j = ++A.begin();
+
+ Assert (k < j, ExcInternalError());
+ Assert (j > k, ExcInternalError());
+
+ Assert (!(j < k), ExcInternalError());
+ Assert (!(k > j), ExcInternalError());
+
+ Assert (k != j, ExcInternalError());
+ Assert (!(k == j), ExcInternalError());
+
+ Assert (k == k, ExcInternalError());
+ Assert (!(k != k), ExcInternalError());
+
+ deallog << "OK" << std::endl;
+}
+
+
+
+int main ()
+{
+ std::ofstream logfile("sparse_matrix_iterator_12.output");
+ deallog.attach(logfile);
+ deallog.depth_console(0);
+
+ try
+ {
+ test ();
+ }
+ catch (std::exception &exc)
+ {
+ std::cerr << std::endl << std::endl
+ << "----------------------------------------------------"
+ << std::endl;
+ std::cerr << "Exception on processing: " << std::endl
+ << exc.what() << std::endl
+ << "Aborting!" << std::endl
+ << "----------------------------------------------------"
+ << std::endl;
+
+ return 1;
+ }
+ catch (...)
+ {
+ std::cerr << std::endl << std::endl
+ << "----------------------------------------------------"
+ << std::endl;
+ std::cerr << "Unknown exception!" << std::endl
+ << "Aborting!" << std::endl
+ << "----------------------------------------------------"
+ << std::endl;
+ return 1;
+ };
+}