new file mode 100644
--- /dev/null
+++ b/src/ov-cs-list.cc
@@ -0,0 +1,466 @@
+/*
+
+Copyright (C) 2002 John W. Eaton
+
+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 2, 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, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+
+#if defined (__GNUG__)
+#pragma implementation
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <iostream>
+#include <strstream>
+
+#include "lo-utils.h"
+
+#include "defun.h"
+#include "error.h"
+#include "ov-cs-list.h"
+#include "unwind-prot.h"
+
+DEFINE_OCTAVE_ALLOCATOR (octave_cs_list);
+
+DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_cs_list, "cs-list");
+
+#if 0
+
+octave_value
+octave_list::subsref (const std::string type,
+		      const SLList<octave_value_list>& idx)
+{
+  octave_value retval;
+
+  switch (type[0])
+    {
+    case '(':
+      {
+	octave_value_list tmp_idx = idx.front ();
+
+	if (tmp_idx.length () == 1)
+	  {
+	    idx_vector i = tmp_idx (0).index_vector ();
+
+	    retval = octave_value_list (lst.index (i));
+	  }
+	else
+	  error ("only one index allowed for lists");
+      }
+      break;
+
+    case '{':
+      {
+	octave_value_list tmp_idx = idx.front ();
+
+	if (tmp_idx.length () == 1)
+	  {
+	    idx_vector i = tmp_idx (0).index_vector ();
+
+	    octave_value_list tmp = lst.index (i);
+
+	    if (tmp.length () == 1)
+	      retval = tmp(0);
+	  }
+	else
+	  error ("only one index allowed for lists");
+      }
+      break;
+
+    case '.':
+      {
+	std::string nm = type_name ();
+	error ("%s cannot be indexed with %c", nm.c_str (), type[0]);
+      }
+      break;
+
+    default:
+      panic_impossible ();
+    }
+
+  return retval.next_subsref (type, idx);
+}
+
+octave_value
+octave_list::do_index_op (const octave_value_list& idx, int resize_ok)
+{
+  octave_value retval;
+
+  if (idx.length () == 1)
+    {
+      idx_vector i = idx (0).index_vector ();
+
+      retval = octave_value_list (lst.index (i, resize_ok));
+    }
+  else
+    error ("lists may only be indexed by a single scalar");
+
+  return retval;
+}
+
+octave_value
+octave_list::subsasgn (const std::string type,
+		       const SLList<octave_value_list>& idx,
+		       const octave_value& rhs)
+{
+  octave_value retval;
+
+  int n = type.length ();
+
+  octave_value t_rhs = rhs;
+
+  if (n > 1)
+    {
+      switch (type[0])
+	{
+	case '(':
+	  {
+	    octave_value tmp = do_index_op (idx.front (), true);
+
+	    if (! tmp.is_defined ())
+	      tmp = octave_value::empty_conv (type.substr (1), rhs);
+
+	    if (! error_state)
+	      {
+		SLList<octave_value_list> next_idx (idx);
+
+		next_idx.remove_front ();
+
+		t_rhs = tmp.subsasgn (type.substr (1), next_idx, rhs);
+	      }
+	  }
+	  break;
+
+	case '{':
+	case '.':
+	  {
+	    std::string nm = type_name ();
+	    error ("%s cannot be indexed with %c", nm.c_str (), type[0]);
+	  }
+	  break;
+
+	default:
+	  panic_impossible ();
+	}
+    }
+
+  if (! error_state)
+    {
+      switch (type[0])
+	{
+	case '(':
+	  {
+	    octave_value_list i = idx.front ();
+
+	    assign (i, t_rhs);
+
+	    retval = octave_value (this, count + 1);
+	  }
+	  break;
+
+	case '{':
+	case '.':
+	  {
+	    std::string nm = type_name ();
+	    error ("%s cannot be indexed with %c", nm.c_str (), type[0]);
+	  }
+	  break;
+
+	default:
+	  panic_impossible ();
+	}
+    }
+
+  return retval;
+}
+
+void
+octave_list::assign (const octave_value_list& idx, const octave_value& rhs)
+{
+  if (idx.length () == 1)
+    {
+      int i = idx(0).int_value (true);
+
+      if (! error_state)
+	{
+	  int n = lst.length ();
+
+	  if (i > 0 && (Vresize_on_range_error || i <= n))
+	    lst(i-1) = rhs;
+	  else
+	    error ("list index = %d out of range", i);
+	}
+      else
+	error ("list index must be an integer");
+    }
+  else
+    error ("lists may only be indexed by a single scalar");
+}
+
+void
+octave_list::print (std::ostream& os, bool) const
+{
+  print_raw (os);
+}
+
+void
+octave_list::print_raw (std::ostream& os, bool) const
+{
+  unwind_protect::begin_frame ("octave_list_print");
+
+  int n = lst.length ();
+
+  if (n > 0)
+    {
+      indent (os);
+      os << "(";
+      newline (os);
+
+      increment_indent_level ();
+
+      for (int i = 0; i < n; i++)
+	{
+	  std::ostrstream buf;
+	  buf << "[" << i+1 << "]" << std::ends;
+	  const char *nm = buf.str ();
+
+	  octave_value val = lst(i);
+
+	  val.print_with_name (os, nm);
+
+	  delete [] nm;
+	}
+
+      decrement_indent_level ();
+
+      indent (os);
+      os << ")";
+    }
+  else
+    os << "()";
+
+  newline (os);
+
+  unwind_protect::run_frame ("octave_list_print");
+}
+
+bool
+octave_list::print_name_tag (std::ostream& os, const std::string& name) const
+{
+  indent (os);
+  if (lst.length () == 0)
+    os << name << " = ";
+  else
+    {
+      os << name << " =";
+      newline (os);
+    }
+  return false;
+}
+
+DEFUN (list, args, ,
+  "-*- texinfo -*-\n\
+@deftypefn {Built-in Function} {} list (@var{a1}, @var{a2}, @dots{})\n\
+Create a new list with elements given by the arguments @var{a1},\n\
+@var{a2}, @dots{}.\n\
+@end deftypefn")
+{
+  return octave_value (args);
+}
+
+DEFUN (nth, args, ,
+  "-*- texinfo -*-\n\
+@deftypefn {Built-in Function} {} nth (@var{list}, @var{n})\n\
+Return the @var{n}-th element of @var{list}.\n\
+@end deftypefn")
+{
+  octave_value retval;
+
+  if (args.length () == 2)
+    {
+      octave_value_list lst = args(0).list_value ();
+
+      if (! error_state)
+	{
+	  int n = args(1).int_value (true);
+
+	  if (! error_state)
+	    {
+	      if (n > 0 && n <= lst.length ())
+		retval = lst(n-1);
+	      else
+		error ("nth: index = %d out of range", n);
+	    }
+	  else
+	    error ("nth: second argument must be an integer");
+	}
+      else
+	error ("nth: first argument must be a list");
+    }
+  else
+    print_usage ("nth");
+
+  return retval;
+}
+
+DEFUN (append, args, ,
+  "-*- texinfo -*-\n\
+@deftypefn {Built-in Function} {} append (@var{list}, @var{a1}, @var{a2}, @dots{})\n\
+Return a new list created by appending @var{a1}, @var{a1}, @dots{}, to\n\
+@var{list}.  If any of the arguments to be appended is a list, its\n\
+elements are appended individually.  For example,\n\
+\n\
+@example\n\
+x = list (1, 2);\n\
+y = list (3, 4);\n\
+append (x, y);\n\
+@end example\n\
+\n\
+@noindent\n\
+results in the list containing the four elements @samp{(1 2 3 4)}, not\n\
+a list containing the three elements @samp{(1 2 (3 4))}.\n\
+@end deftypefn")
+{
+  octave_value retval;
+
+  int nargin = args.length ();
+
+  if (nargin > 1)
+    {
+      octave_value_list tmp = args(0).list_value ();
+
+      if (! error_state)
+	{
+	  for (int i = 1; i < nargin; i++)
+	    {
+	      octave_value ov = args(i);
+
+	      if (ov.is_list ())
+		tmp.append (ov.list_value ());
+	      else
+		tmp.append (ov);
+	    }
+
+	  retval = tmp;
+	}
+    }
+  else
+    print_usage ("append");
+
+  return retval;
+}
+
+DEFUN (reverse, args, ,
+  "-*- texinfo -*-\n\
+@deftypefn {Built-in Function} {} reverse (@var{list})\n\
+Return a new list created by reversing the elements of @var{list}.\n\
+@end deftypefn")
+{
+  octave_value retval;
+
+  int nargin = args.length ();
+
+  if (nargin == 1)
+    {
+      octave_value_list tmp = args(0).list_value ();
+
+      if (! error_state)
+	  retval = tmp.reverse ();
+    }
+  else
+    print_usage ("reverse");
+
+  return retval;
+}
+
+DEFUN (splice, args, ,
+  "-*- texinfo -*-\n\
+@deftypefn {Built-in Function} {} splice (@var{list_1}, @var{offset}, @var{length}, @var{list_2})\n\
+Replace @var{length} elements of @var{list_1} beginning at\n\
+@var{offset} with the contents of @var{list_2} (if any).  If\n\
+@var{length} is omitted, all elements from @var{offset} to the end of\n\
+@var{list_1} are replaced.  As a special case, if @var{offset} is one\n\
+greater than the length of @var{list_1} and @var{length} is 0, splice\n\
+is equivalent to @code{append (@var{list_1}, @var{list_2})}.\n\
+@end deftypefn") 
+{
+  octave_value retval;
+
+  int nargin = args.length ();
+
+  if (nargin > 1 && nargin < 5)
+    {
+      octave_value_list list_1 = args(0).list_value ();
+
+      if (! error_state)
+	{
+	  int offset = args(1).int_value (true);
+
+	  if (! error_state)
+	    {
+	      offset--;
+
+	      int length = 0;
+
+	      octave_value_list list_2;
+
+	      if (nargin < 3)
+		length = list_1.length () - offset;
+	      else
+		{
+		  length = args(2).int_value (true);
+
+		  if (! error_state)
+		    {
+		      if (nargin == 4)
+			{
+			  list_2 = args(3).list_value ();
+
+			  if (error_state)
+			    error ("splice: fourth argument must be a list");
+			}
+		    }
+		  else
+		    error ("splice: LENGTH must be an integer");
+		}
+
+	      if (! error_state)
+		retval = list_1.splice (offset, length, list_2);
+	    }
+	  else
+	    error ("splice: OFFSET must be an integer");
+	}
+      else
+	error ("splice: first argument must be a list");      
+    }
+  else
+    print_usage ("splice");
+
+  return retval;
+}
+
+#endif
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; End: ***
+*/

new file mode 100644
--- /dev/null
+++ b/src/ov-cs-list.h
@@ -0,0 +1,115 @@
+/*
+
+Copyright (C) 2002 John W. Eaton
+
+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 2, 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, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+
+#if !defined (octave_cs_list_h)
+#define octave_cs_list_h 1
+
+#if defined (__GNUG__)
+#pragma interface
+#endif
+
+#include <cstdlib>
+
+#include <iostream>
+#include <string>
+
+#include "mx-base.h"
+#include "str-vec.h"
+
+#include "error.h"
+#include "oct-alloc.h"
+#include "oct-obj.h"
+#include "ov-list.h"
+#include "ov-typeinfo.h"
+
+class tree_walker;
+
+// Lists.
+
+class
+octave_cs_list : public octave_list
+{
+public:
+
+  octave_cs_list (void)
+    : octave_list () { }
+
+  octave_cs_list (const octave_value_list& l)
+    : octave_list (l) { }
+
+  octave_cs_list (const octave_cs_list& l)
+    : octave_list (l) { }
+
+  ~octave_cs_list (void) { }
+
+  octave_value *clone (void) const { return new octave_cs_list (*this); }
+  octave_value *empty_clone (void) const { return new octave_cs_list (); }
+
+#if 0
+  octave_value subsref (const std::string type,
+			const SLList<octave_value_list>& idx);
+
+  octave_value do_index_op (const octave_value_list& idx, int resize_ok);
+
+  octave_value subsasgn (const std::string type,
+			 const SLList<octave_value_list>& idx,
+			 const octave_value& rhs);
+
+  void assign (const octave_value_list& idx, const octave_value& rhs);
+
+  int length (void) const { return lst.length (); }
+
+  bool is_defined (void) const { return true; }
+
+  bool is_constant (void) const { return true; }
+
+#endif
+
+  bool is_cs_list (void) const { return true; }
+
+#if 0
+
+  bool is_list (void) const { return true; }
+
+  octave_value_list list_value (void) const { return lst; }
+
+  void print (std::ostream& os, bool pr_as_read_syntax = false) const;
+
+  void print_raw (std::ostream& os, bool pr_as_read_syntax = false) const;
+
+  bool print_name_tag (std::ostream& os, const std::string& name) const;
+#endif
+
+private:
+
+  DECLARE_OV_TYPEID_FUNCTIONS_AND_DATA
+
+  DECLARE_OCTAVE_ALLOCATOR
+};
+
+#endif
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; End: ***
+*/