new file mode 100644
--- /dev/null
+++ b/src/ov-lazy-idx.cc
@@ -0,0 +1,115 @@
+
+/*
+
+Copyright (C) 2010 VZLU Prague
+
+This file is part of Octave.
+
+Octave is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 3 of the License, or (at your
+option) any later version.
+
+Octave is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with Octave; see the file COPYING.  If not, see
+<http://www.gnu.org/licenses/>.
+
+*/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "ov-lazy-idx.h"
+#include "ops.h"
+#include "ov-scalar.h"
+#include "ls-oct-ascii.h"
+#include "ls-oct-binary.h"
+
+DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_lazy_index, "lazy_index", "double");
+
+static octave_base_value *
+default_numeric_conversion_function (const octave_base_value& a)
+{
+  CAST_CONV_ARG (const octave_lazy_index&);
+
+  return v.full_value ().clone ();
+}
+
+octave_base_value::type_conv_info
+octave_lazy_index::numeric_conversion_function (void) const
+{
+  return octave_base_value::type_conv_info (default_numeric_conversion_function,
+                                            octave_matrix::static_type_id ());
+}
+
+octave_base_value *
+octave_lazy_index::try_narrowing_conversion (void)
+{
+  octave_base_value *retval = 0;
+
+  switch (index.length (0))
+    {
+    case 1:
+      retval = new octave_scalar (static_cast<double> (index(0) + 1));
+      break;
+
+    case 0:
+      retval = new octave_matrix (NDArray (index.orig_dimensions ()));
+      break;
+
+    default:
+      break;
+    }
+
+  return retval;
+}
+
+static const std::string value_save_tag ("index_value");
+
+bool octave_lazy_index::save_ascii (std::ostream& os)
+{
+  return save_ascii_data (os, make_value (), value_save_tag, false, 0);
+}
+
+bool octave_lazy_index::load_ascii (std::istream& is)
+{
+  bool dummy;
+
+  std::string nm = read_ascii_data (is, std::string (), dummy, value, 0);
+
+  if (nm != value_save_tag)
+    error ("lazy_index: corrupted data on load");
+  else
+    index = value.index_vector ();
+
+  return ! error_state;
+}
+
+
+bool octave_lazy_index::save_binary (std::ostream& os, bool& save_as_floats)
+{
+  return save_binary_data (os, make_value (), value_save_tag, false, 0, save_as_floats);
+}
+
+bool octave_lazy_index::load_binary (std::istream& is, bool swap, 
+                                     oct_mach_info::float_format fmt)
+{
+  bool dummy;
+  std::string doc;
+
+  std::string nm = read_binary_data (is, swap, fmt, std::string (), 
+                                     dummy, value, doc);
+
+  if (nm != value_save_tag)
+    error ("lazy_index: corrupted data on load");
+  else
+    index = value.index_vector ();
+
+  return ! error_state;
+}