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https://github.com/idris-lang/Idris2.git
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48 lines
1.6 KiB
Idris
48 lines
1.6 KiB
Idris
%default partial
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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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append : Vect n a -> Vect m a -> Vect (n + m) a
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append [] ys = ys
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append (x :: xs) ys = x :: append xs ys
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-- Primarily to check the number of cases in the totality checker doesn't
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-- explode because of all the Nils and Nats
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funny : Vect 4 Bool -> Int
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funny [False, False, False, False] = 0
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funny [False, False, False, True] = 1
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funny [False, False, True, False] = 2
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funny [False, False, True, True] = 3
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funny [False, True, False, False] = 4
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funny [False, True, False, True] = 5
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funny [False, True, True, False] = 6
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funny [False, True, True, True] = 7
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funny [True, False, False, False] = 8
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funny [True, False, False, True] = 0
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funny [True, False, True, False] = 10
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funny [True, False, True, True] = 11
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funny [True, True, False, False] = 12
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funny [True, True, False, True] = 13
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funny [True, True, True, False] = 14
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funny [True, True, True, True] = 15
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notFunny : Vect 4 Bool -> Int
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notFunny [False, False, False, False] = 0
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notFunny [False, False, False, True] = 1
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notFunny [False, False, True, False] = 2
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-- notFunny [False, False, True, True] = 3
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notFunny [False, True, False, False] = 4
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notFunny [False, True, False, True] = 5
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notFunny [False, True, True, False] = 6
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-- notFunny [False, True, True, True] = 7
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notFunny [True, False, False, False] = 8
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notFunny [True, False, False, True] = 0
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notFunny [True, False, True, False] = 10
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notFunny [True, False, True, True] = 11
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notFunny [True, True, False, False] = 12
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notFunny [True, True, False, True] = 13
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notFunny [True, True, True, False] = 14
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notFunny [True, True, True, True] = 15
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