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13 lines
238 B
Idris
13 lines
238 B
Idris
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data Foo : Type -> Type where
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IsNat : Foo Nat
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IsBool : Foo Bool
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okay : a -> Foo a -> Bool
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okay Z IsNat = False
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okay True IsBool = True
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bad : a -> Foo a -> Bool
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bad Z IsNat = False
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bad True IsBool = True
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bad (Just 0) _ = False
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