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------------------------------------------------------------------------------
--                                                                          --
--                         GNAT LIBRARY COMPONENTS                          --
--                                                                          --
--               A D A . I T E R A T O R . I N T E R F A C E S              --
--                                                                          --
--                                 S p e c                                  --
--                                                                          --
--          Copyright (C) 2004-2011, Free Software Foundation, Inc.         --
--                                                                          --
-- This specification is derived from the Ada Reference Manual for use with --
-- GNAT. The copyright notice above, and the license provisions that follow --
-- apply solely to the  contents of the part following the private keyword. --
--                                                                          --
-- GNAT is free software;  you can  redistribute it  and/or modify it under --
-- terms of the  GNU General Public License as published  by the Free Soft- --
-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
--                                                                          --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception,   --
-- version 3.1, as published by the Free Software Foundation.               --
--                                                                          --
-- You should have received a copy of the GNU General Public License and    --
-- a copy of the GCC Runtime Library Exception along with this program;     --
-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
-- <http://www.gnu.org/licenses/>.                                          --
--                                                                          --
------------------------------------------------------------------------------

generic
   type Cursor;
   with function Has_Element (Position : Cursor) return Boolean;
   pragma Unreferenced (Has_Element);
package Ada.Iterator_Interfaces is
   pragma Pure;

   type Forward_Iterator is limited interface;
   function First (Object : Forward_Iterator) return Cursor is abstract;
   function Next
     (Object   : Forward_Iterator;
      Position : Cursor) return Cursor is abstract;
   type Reversible_Iterator is limited interface and Forward_Iterator;

   function Last (Object : Reversible_Iterator) return Cursor is abstract;
   function Previous
     (Object   : Reversible_Iterator;
      Position : Cursor) return Cursor is abstract;
end Ada.Iterator_Interfaces;