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24 lines
482 B
Idris
24 lines
482 B
Idris
parameters (n : Nat)
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data X : Type -> Type where
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A : t -> X t
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B : t -> X t
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Eq t => Eq (X t) where
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A x == A y = x == y
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B x == B y = x == y
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_ == _ = False
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test : Char -> Char -> Bool
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test x y = A x == A y
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mkEq : (approx : Bool) -> Eq Nat
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mkEq True = withinOne
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where
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[withinOne] Eq Nat where
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Z == Z = True
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Z == S Z = True
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S Z == Z = True
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S x == S y = x == y
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_ == _ = False
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mkEq False = %search
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