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13 lines
230 B
Idris
13 lines
230 B
Idris
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import Data.List
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data Vect : Nat -> Type -> Type where
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Nil : Vect Z a
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(::) : a -> Vect k a -> Vect (S k) a
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length : Vect n a -> Nat
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length [] = Z
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length (x :: xs) = S (length xs)
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wrong : Nat -> Nat
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wrong x = length x
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