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26 lines
544 B
Idris
26 lines
544 B
Idris
data A : Type where
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The : Type -> A
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U : A -> Type
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U (The x) = x
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works : (a : A) -> (H : U a) -> (let q = H in Nat)
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works a h = 0
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fails : (a : A) -> (H : U a) -> (let q : U a = H in Nat)
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fails a h = 0
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dolet : Maybe Int -> Maybe Int -> Maybe Int
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dolet x y
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= do let Just x' : Maybe Int = x
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| Nothing => Nothing
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y' <- y
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pure (x' + y')
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dolet2 : Maybe Int -> Maybe Int -> Maybe Int
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dolet2 x y
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= do let Just x' : Maybe String = x
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| Nothing => Nothing
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y' <- y
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pure (x' + y')
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