-- This file is  free  software, which  comes  along  with  SmallEiffel. 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) 1994-98 LORIA - UHP - CRIN - INRIA - FRANCE
--            Dominique COLNET and Suzanne COLLIN - colnet@loria.fr 
--                       http://SmallEiffel.loria.fr
--
class LINK2[E]
   --
   -- To implement TWO_WAY_LINKED_LIST[E].
   --

creation {LINK2_LIST,TWO_WAY_LINKED_LIST} make

feature {LINK2_LIST,TWO_WAY_LINKED_LIST,LINK2}
   
   item: E;

   previous, next: like Current;

feature {LINK2_LIST,TWO_WAY_LINKED_LIST}
   
   make(i: like item; p: like previous; n: like next) is
      do
         item := i;
         previous := p;
         next := n;
      ensure
         item = i;
         previous = p;
         next = n
      end;
   
feature {LINK2_LIST,TWO_WAY_LINKED_LIST,LINK2}

   set_item(i: like item) is
      do
         item := i;
      ensure
         item = i
      end;

   set_next(n: like next) is
      do
         next := n;
      ensure
         next = n
      end;

   set_all_with(v: like item) is
      local
         lnk: like Current;
      do
         from
            lnk := Current;
         until
            lnk = Void
         loop
            lnk.set_item(v);
            lnk := lnk.next;
         end;
      end;

   set_previous(p: like previous) is
      do
         previous := p;
      ensure
         previous = p
      end;

end -- LINK2[E]