22 lines
447 B
Text
22 lines
447 B
Text
namespace Ex
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class Get (Cont : Type u) (Idx : Type v) (Elem : outParam (Type w)) where
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get (xs : Cont) (i : Idx) : Elem
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export Get (get)
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instance [Inhabited α] : Get (Array α) Nat α where
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get xs i := xs.get! i
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instance : Coe Bool Nat where
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coe b := if b then 1 else 0
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def g (as : Array (Array Bool)) : Nat :=
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let bs := get as 0
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get bs 0
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def h (as : Array (Array Bool)) (i : Nat) : Nat :=
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let bs := get as i
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get bs i
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end Ex
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