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23 lines
535 B
Idris
23 lines
535 B
Idris
import Data.Vect
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append : Vect n a -> Vect m a -> Vect (n + m) a
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append xs ys = ?append_rhs
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data DoorState = Open | Closed
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data Door : DoorState -> Type where
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MkDoor : (doorId : Int) -> Door st
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openDoor : (1 d : Door Closed) -> Door Open
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closeDoor : (1 d : Door Open) -> Door Closed
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newDoor : (1 p : (1 d : Door Closed) -> IO ()) -> IO ()
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deleteDoor : (1 d : Door Closed) -> IO ()
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doorProg : IO ()
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doorProg
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= newDoor $ \d =>
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let d' = openDoor d
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d'' = closeDoor d' in
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deleteDoor d''
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