Class EWG_STRUCT

-- Does item point to a valid C struct ?

-- Is the contents of item referenced by other C or Eiffel code?
-- If is_shared is True then when the current object will be
-- collected by the garbage collector, the wrapped struct will
-- also be freed.
-- This is a good idea, only if you can be sure that when the
-- Eiffel object gets collected, the C side does not have a reference
-- to the wrapped struct anymore.

-- Pointer to the wrapped struct

-- Size of the struct in bytes
-- This needs to be redefined by the
-- decendant.