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-- 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: INRIA - LORIA (INRIA Lorraine) - ESIAL U.H.P.
-- - University of Nancy 1 - FRANCE
-- Copyright(C) 2003: INRIA - LORIA (INRIA Lorraine) - I.U.T. Charlemagne
-- - University of Nancy 2 - FRANCE
--
-- Dominique COLNET, Suzanne COLLIN, Olivier ZENDRA,
-- Philippe RIBET, Cyril ADRIAN
--
-- http://SmartEiffel.loria.fr - SmartEiffel@loria.fr
--
class MEMO[E]
-- This strange tiny class is useful to share a common volatile
-- expanded value between different objects or as the result of
-- a once function.
-- So in most cases the E type is expanded and the reference to the
-- MEMO[E] container object is shared.
-- Other name for `MEMO' is sometimes `CELL'
feature
item: E
set_item(i: like item) is
do
item := i
ensure
item = i
end
clear is
-- Reset `item' with the default value.
local
default_item: like item
do
item := default_item
end
end -- MEMO[E]
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