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14 lines
332 B
Idris
14 lines
332 B
Idris
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import Control.Monad.Identity
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interface Functor' (0 f :Type -> Type) where
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map': (a -> b) -> f a -> f b
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Product' : (Type -> Type) -> (Type -> Type) -> (Type -> Type -> Type)
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Product' f g = (\a, b => (f a, g b))
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[prod] Functor' f => Functor' g => Functor' ((Product' f g) a)
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Functor' Identity where
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map' f (Id x) = Id (f x)
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