special ()
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wenshe...@gmail.com
Oct 5, 2006, 11:02:17 PM10/5/06
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Prelude> [[[]]]
[[[]]]
Prelude> ((()))
()
Prelude> :t [[[]]]
[[[]]] :: [[[a]]]
Prelude> :t ((()))
((())) :: ()
Prelude> ((),())
((),())
Prelude> ((),(),((),()))
((),(),((),()))
Prelude> ((((),())))
((),())
Prelude>
[[[]]]
Prelude> ((()))
()
Prelude> :t [[[]]]
[[[]]] :: [[[a]]]
Prelude> :t ((()))
((())) :: ()
Prelude> ((),())
((),())
Prelude> ((),(),((),()))
((),(),((),()))
Prelude> ((((),())))
((),())
Prelude>
So if there's only a single element, (a) is a
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