-- This file is  free  software, which  comes  along  with  SmartEiffel. This
-- software  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. You can modify it as you want, provided
-- this header is kept unaltered, and a notification of the changes is added.
-- You  are  allowed  to  redistribute  it and sell it, alone or as a part of
-- another product.
--       Copyright (C) 1994-2002 LORIA - INRIA - U.H.P. Nancy 1 - FRANCE
--          Dominique COLNET and Suzanne COLLIN - SmartEiffel@loria.fr
--                       http://SmartEiffel.loria.fr
--
class ITERATOR_ON_DICTIONARY_KEYS[E->HASHABLE]

inherit ITERATOR[E]

creation make

feature {NONE}

   dictionary: DICTIONARY[ANY,E]
	 -- The one to be traversed.

   item_index: INTEGER

feature

   make(d: DICTIONARY[ANY,E]) is
      require
	 d /= Void
      do
	 dictionary := d
	 item_index := 1
      ensure
	 dictionary = d
      end

   start is
      do
	 item_index := 1
      end

   is_off: BOOLEAN is
      do
	 Result := item_index > dictionary.count
      end

   item: E is
      do
	 Result := dictionary.key(item_index)
      end

   next is
      do
	 item_index := item_index + 1
      end

end