--- a/libinterp/parse-tree/module.mk	Sat Mar 09 18:42:43 2013 +0000
+++ b/libinterp/parse-tree/module.mk	Sat Mar 09 18:04:51 2013 -0500
@@ -21,6 +21,7 @@
 PARSE_TREE_INC = \
   parse-tree/pt-all.h \
   parse-tree/pt-arg-list.h \
+  parse-tree/pt-array-list.h \
   parse-tree/pt-assign.h \
   parse-tree/pt-binop.h \
   parse-tree/pt-bp.h \
@@ -52,6 +53,7 @@
 
 PARSE_TREE_SRC = \
   parse-tree/pt-arg-list.cc \
+  parse-tree/pt-array-list.cc \
   parse-tree/pt-assign.cc \
   parse-tree/pt-binop.cc \
   parse-tree/pt-bp.cc \

--- a/libinterp/parse-tree/oct-parse.in.yy	Sat Mar 09 18:42:43 2013 +0000
+++ b/libinterp/parse-tree/oct-parse.in.yy	Sat Mar 09 18:04:51 2013 -0500
@@ -2956,12 +2956,12 @@
   return row;
 }
 
-// Finish building a matrix list.
+// Finish building an array_list.
 
 tree_expression *
-octave_parser::finish_matrix (tree_matrix *m)
+octave_parser::finish_array_list (tree_array_list *array_list)
 {
-  tree_expression *retval = m;
+  tree_expression *retval = array_list;
 
   unwind_protect frame;
 
@@ -2974,24 +2974,25 @@
   discard_error_messages = true;
   discard_warning_messages = true;
 
-  if (m->all_elements_are_constant ())
+  if (array_list->all_elements_are_constant ())
     {
-      octave_value tmp = m->rvalue1 ();
+      octave_value tmp = array_list->rvalue1 ();
 
       if (! (error_state || warning_state))
         {
           tree_constant *tc_retval
-            = new tree_constant (tmp, m->line (), m->column ());
+            = new tree_constant (tmp, array_list->line (),
+                                 array_list->column ());
 
           std::ostringstream buf;
 
           tree_print_code tpc (buf);
 
-          m->accept (tpc);
+          array_list->accept (tpc);
 
           tc_retval->stash_original_text (buf.str ());
 
-          delete m;
+          delete array_list;
 
           retval = tc_retval;
         }
@@ -3000,12 +3001,20 @@
   return retval;
 }
 
+// Finish building a matrix list.
+
+tree_expression *
+octave_parser::finish_matrix (tree_matrix *m)
+{
+  return finish_array_list (m);
+}
+
 // Finish building a cell list.
 
 tree_expression *
 octave_parser::finish_cell (tree_cell *c)
 {
-  return finish_matrix (c);
+  return finish_array_list (c);
 }
 
 void

--- a/libinterp/parse-tree/parse.h	Sat Mar 09 18:42:43 2013 +0000
+++ b/libinterp/parse-tree/parse.h	Sat Mar 09 18:04:51 2013 -0500
@@ -41,6 +41,7 @@
 class tree;
 class tree_anon_fcn_handle;
 class tree_argument_list;
+class tree_array_list;
 class tree_cell;
 class tree_colon_expression;
 class tree_command;
@@ -330,6 +331,10 @@
   // Validate argument list forming a matrix or cell row.
   tree_argument_list *validate_matrix_row (tree_argument_list *row);
 
+  // Finish building an array_list (common action for finish_matrix
+  // and finish_cell).
+  tree_expression *finish_array_list (tree_array_list *a);
+
   // Finish building a matrix list.
   tree_expression *finish_matrix (tree_matrix *m);
 

--- a/libinterp/parse-tree/pt-arg-list.h	Sat Mar 09 18:42:43 2013 +0000
+++ b/libinterp/parse-tree/pt-arg-list.h	Sat Mar 09 18:04:51 2013 -0500
@@ -33,6 +33,7 @@
 #include "str-vec.h"
 
 #include "base-list.h"
+#include "symtab.h"
 
 // Argument lists.  Used to hold the list of expressions that are the
 // arguments in a function call or index expression.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libinterp/parse-tree/pt-array-list.cc	Sat Mar 09 18:04:51 2013 -0500
@@ -0,0 +1,108 @@
+/*
+
+Copyright (C) 2013 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 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 <iostream>
+
+#include "error.h"
+#include "pt-array-list.h"
+
+tree_array_list::~tree_array_list (void)
+{
+  while (! empty ())
+    {
+      iterator p = begin ();
+      delete *p;
+      erase (p);
+    }
+}
+
+bool
+tree_array_list::all_elements_are_constant (void) const
+{
+  for (const_iterator p = begin (); p != end (); p++)
+    {
+      octave_quit ();
+
+      tree_argument_list *elt = *p;
+
+      if (! elt->all_elements_are_constant ())
+        return false;
+    }
+
+  return true;
+}
+
+bool
+tree_array_list::has_magic_end (void) const
+{
+  for (const_iterator p = begin (); p != end (); p++)
+    {
+      octave_quit ();
+
+      tree_argument_list *elt = *p;
+
+      if (elt && elt->has_magic_end ())
+        return true;
+    }
+
+  return false;
+}
+
+void
+tree_array_list::copy_base (const tree_array_list& array_list)
+{
+  tree_expression::copy_base (array_list);
+}
+
+void
+tree_array_list::copy_base (const tree_array_list& array_list,
+                            symbol_table::scope_id scope,
+                            symbol_table::context_id context)
+{
+  for (const_iterator p = array_list.begin (); p != array_list.end (); p++)
+    {
+      const tree_argument_list *elt = *p;
+
+      append (elt ? elt->dup (scope, context) : 0);
+    }
+
+  copy_base (*this);
+}
+
+tree_expression *
+tree_array_list::dup (symbol_table::scope_id scope,
+                      symbol_table::context_id context) const
+{
+  panic_impossible ();
+  return 0;
+}
+
+void
+tree_array_list::accept (tree_walker&)
+{
+  panic_impossible ();
+}
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libinterp/parse-tree/pt-array-list.h	Sat Mar 09 18:04:51 2013 -0500
@@ -0,0 +1,72 @@
+/*
+
+Copyright (C) 2013 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 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/>.
+
+*/
+
+#if !defined (octave_tree_array_list_h)
+#define octave_tree_array_list_h 1
+
+#include "base-list.h"
+#include "pt-arg-list.h"
+#include "pt-exp.h"
+#include "symtab.h"
+
+// Base class for cell arrays and matrices.
+
+class
+tree_array_list : public tree_expression,
+                  public octave_base_list<tree_argument_list *>
+{
+public:
+
+  tree_array_list (tree_argument_list *row = 0, int l = -1, int c = -1)
+    : tree_expression (l, c), octave_base_list<tree_argument_list *> ()
+  {
+    if (row)
+      append (row);
+  }
+
+  ~tree_array_list (void);
+
+  bool all_elements_are_constant (void) const;
+
+  bool has_magic_end (void) const;
+
+  void copy_base (const tree_array_list& array_list);
+
+  void copy_base (const tree_array_list& array_list,
+                  symbol_table::scope_id scope,
+                  symbol_table::context_id context);
+
+  tree_expression *dup (symbol_table::scope_id scope,
+                        symbol_table::context_id context) const;
+
+  void accept (tree_walker& tw);
+
+private:
+
+  // No copying!
+
+  tree_array_list (const tree_array_list&);
+
+  tree_array_list& operator = (const tree_array_list&);
+};
+
+#endif

--- a/libinterp/parse-tree/pt-cell.cc	Sat Mar 09 18:42:43 2013 +0000
+++ b/libinterp/parse-tree/pt-cell.cc	Sat Mar 09 18:04:51 2013 -0500
@@ -27,17 +27,12 @@
 #include <iostream>
 
 #include "Cell.h"
-#include "defun.h"
-#include "error.h"
 #include "oct-obj.h"
 #include "pt-arg-list.h"
-#include "pt-bp.h"
 #include "pt-exp.h"
 #include "pt-cell.h"
 #include "pt-walk.h"
-#include "utils.h"
 #include "ov.h"
-#include "variables.h"
 
 octave_value
 tree_cell::rvalue1 (int)
@@ -107,14 +102,7 @@
 {
   tree_cell *new_cell = new tree_cell (0, line (), column ());
 
-  for (const_iterator p = begin (); p != end (); p++)
-    {
-      const tree_argument_list *elt = *p;
-
-      new_cell->append (elt ? elt->dup (scope, context) : 0);
-    }
-
-  new_cell->copy_base (*this);
+  new_cell->copy_base (*this, scope, context);
 
   return new_cell;
 }

--- a/libinterp/parse-tree/pt-cell.h	Sat Mar 09 18:42:43 2013 +0000
+++ b/libinterp/parse-tree/pt-cell.h	Sat Mar 09 18:04:51 2013 -0500
@@ -37,12 +37,13 @@
 // General cells.
 
 class
-tree_cell : public tree_matrix
+tree_cell : public tree_array_list
 {
 public:
 
   tree_cell (tree_argument_list *row = 0, int l = -1, int c = -1)
-    : tree_matrix (row, l, c) { }
+    : tree_array_list (row, l, c)
+  { }
 
   ~tree_cell (void) { }
 

--- a/libinterp/parse-tree/pt-mat.cc	Sat Mar 09 18:42:43 2013 +0000
+++ b/libinterp/parse-tree/pt-mat.cc	Sat Mar 09 18:04:51 2013 -0500
@@ -655,48 +655,6 @@
   ok = ! error_state;
 }
 
-tree_matrix::~tree_matrix (void)
-{
-  while (! empty ())
-    {
-      iterator p = begin ();
-      delete *p;
-      erase (p);
-    }
-}
-
-bool
-tree_matrix::has_magic_end (void) const
-{
-  for (const_iterator p = begin (); p != end (); p++)
-    {
-      octave_quit ();
-
-      tree_argument_list *elt = *p;
-
-      if (elt && elt->has_magic_end ())
-        return true;
-    }
-
-  return false;
-}
-
-bool
-tree_matrix::all_elements_are_constant (void) const
-{
-  for (const_iterator p = begin (); p != end (); p++)
-    {
-      octave_quit ();
-
-      tree_argument_list *elt = *p;
-
-      if (! elt->all_elements_are_constant ())
-        return false;
-    }
-
-  return true;
-}
-
 octave_value_list
 tree_matrix::rvalue (int nargout)
 {
@@ -1174,14 +1132,7 @@
 {
   tree_matrix *new_matrix = new tree_matrix (0, line (), column ());
 
-  for (const_iterator p = begin (); p != end (); p++)
-    {
-      const tree_argument_list *elt = *p;
-
-      new_matrix->append (elt ? elt->dup (scope, context) : 0);
-    }
-
-  new_matrix->copy_base (*this);
+  new_matrix->copy_base (*this, scope, context);
 
   return new_matrix;
 }

--- a/libinterp/parse-tree/pt-mat.h	Sat Mar 09 18:42:43 2013 +0000
+++ b/libinterp/parse-tree/pt-mat.h	Sat Mar 09 18:04:51 2013 -0500
@@ -32,6 +32,7 @@
 class tree_walker;
 
 #include "base-list.h"
+#include "pt-array-list.h"
 #include "pt-exp.h"
 #include "symtab.h"
 
@@ -39,23 +40,15 @@
 // other matrices, variables, and functions.
 
 class
-tree_matrix : public tree_expression,
-              public octave_base_list<tree_argument_list *>
+tree_matrix : public tree_array_list
 {
 public:
 
   tree_matrix (tree_argument_list *row = 0, int l = -1, int c = -1)
-    : tree_expression (l, c)
-  {
-    if (row)
-      append (row);
-  }
+    : tree_array_list (row, l, c)
+  { }
 
-  ~tree_matrix (void);
-
-  bool has_magic_end (void) const;
-
-  bool all_elements_are_constant (void) const;
+  ~tree_matrix (void) { }
 
   bool rvalue_ok (void) const { return true; }
 

--- a/liboctave/util/base-list.h	Sat Mar 09 18:42:43 2013 +0000
+++ b/liboctave/util/base-list.h	Sat Mar 09 18:04:51 2013 -0500
@@ -23,6 +23,8 @@
 #if !defined (octave_base_list_h)
 #define octave_base_list_h 1
 
+#include <cstdlib>
+
 #include <list>
 
 template <typename elt_type>