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23 lines
386 B
Plaintext
23 lines
386 B
Plaintext
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data Nat : Type where
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Z : Nat
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S : Nat -> Nat
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simpleAs : Nat -> Nat
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simpleAs z@(_) = z
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as : Nat -> Nat
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as Z = Z
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as p@(S $k) = p
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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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data PairNat : Type where
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MkPair : Nat -> Nat -> PairNat
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pairPred : Nat -> PairNat
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pairPred Z = MkPair Z Z
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pairPred (S Z) = MkPair Z Z
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pairPred (S p@(S $k)) = MkPair p k
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