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16 lines
350 B
Plaintext
16 lines
350 B
Plaintext
data Nat : Type where
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Z : Nat
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S : Nat -> Nat
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data Vect : Nat -> Type -> Type where
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Nil : Vect Z $a
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Cons : $a -> Vect $k $a -> Vect (S $k) $a
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plus : Nat -> Nat -> Nat
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plus Z $y = y
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plus (S $k) $y = S (plus k y)
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append : Vect $n $a -> Vect $m $a -> Vect (plus $n $m) $a
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append Nil $ys = ys
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append (Cons $x $xs) $ys = Cons x ?foo
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