On 12/13/06, Alfonso Acosta <alfonso.acosta at gmail.com> wrote:
> deactivate :: Maybe(hd -> IO ()),
According to the spec, NULL here means no-op. So instead of using
Maybe, just set deactivate = \_ -> return () if you see NULL.
--
Taral <taralx at gmail.com>
"You can't prove anything."
-- Gödel's Incompetence Theorem