-- This file is part of a Liberty Eiffel library.
-- See the full copyright at the end.
--
class INTEGER_RANGE_ITERATOR[E_]

inherit
   ITERATOR[E_]

create {INTEGER_RANGE}
   make

feature {ANY}
   start
      do
         item_ := lower
      end

   is_off: BOOLEAN
      do
         Result := item_ > upper
      end

   item: E_
      do
         Result := itemize.item([item_])
      end

   next
      do
         item_ := item_ + 1
      end

feature {}
   lower: INTEGER
   upper: INTEGER
   item_: INTEGER

   make (low, up: INTEGER; a_itemize: like itemize)
      require
         low <= up
         a_itemize /= Void
      do
         lower := low
         upper := up
         itemize := a_itemize
      ensure
         lower = low
         upper = up
         itemize = a_itemize
      end

   itemize: FUNCTION[TUPLE[INTEGER], E_]

feature {ANY} -- Read-only, hence always valid
   iterable_generation: INTEGER 0
   generation: INTEGER 0

invariant
   itemize /= Void

end -- class INTEGER_RANGE_ITERATOR
--
-- Copyright (C) 2009-2017: by all the people cited in the AUTHORS file.
--
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-- of this software and associated documentation files (the "Software"), to deal
-- in the Software without restriction, including without limitation the rights
-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-- copies of the Software, and to permit persons to whom the Software is
-- furnished to do so, subject to the following conditions:
--
-- The above copyright notice and this permission notice shall be included in
-- all copies or substantial portions of the Software.
--
-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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-- THE SOFTWARE.