Plan 9 from Bell Labs’s /usr/web/sources/contrib/fernan/nhc98/src/prelude/Prelude/Enum_Bool.hs

Copyright © 2021 Plan 9 Foundation.
Distributed under the MIT License.
Download the Plan 9 distribution.


module Prelude(Enum(..)) where

import _EnumFromTo
import _EnumFromThen


instance Enum Bool where
    fromEnum   False = 0
    fromEnum   True  = 1

    toEnum   0 = False
    toEnum   1 = True
    toEnum   n = error ("(Prelude.toEnum "++show n++" :: Bool) is wrong")

    enumFrom n        = _enumFromTo  n 1
    enumFromThen n n' = _enumFromThen n n' 1

Bell Labs OSI certified Powered by Plan 9

(Return to Plan 9 Home Page)

Copyright © 2021 Plan 9 Foundation. All Rights Reserved.
Comments to [email protected].