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https://github.com/ilyakooo0/Idris-dev.git
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24 lines
507 B
Idris
24 lines
507 B
Idris
module Main
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%default total
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data U : Type where
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BOOL : U
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NAT : U
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PAIR : U -> U -> U
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interpU : U -> Type
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interpU BOOL = Bool
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interpU NAT = Nat
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interpU (PAIR x y) = (interpU x, interpU y)
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showU : (u : U) -> interpU u -> String
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showU BOOL True = "Yes"
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showU BOOL False = "No"
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showU NAT Z = "Z"
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showU NAT (S x) = "S of " ++ showU NAT x
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showU (PAIR tx ty) (x , y) = "(" ++ showU tx x ++ "," ++ showU ty y ++ ")"
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main : IO ()
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main = putStrLn $ showU NAT 0
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