Created
May 11, 2014 00:39
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Ternary/conditional operator in Haskell
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| module Ternary where | |
| data TernaryBranch a = a :? a deriving (Eq, Ord, Read, Show, Bounded) | |
| instance Functor TernaryBranch where fmap f (x :? y) = f x :? f y | |
| infixr 0 ?:, :?, ?~ | |
| (?:) :: Bool -> TernaryBranch a -> a | |
| True ?: (y :? _) = y | |
| False ?: (_ :? z) = z | |
| (?~) :: Bool -> (a, a) -> a | |
| True ?~ (y, _) = y | |
| False ?~ (_, z) = z |
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