Anonymous avatar Anonymous committed 729a888

example of ARINC downcast

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+{-# LANGUAGE UndecidableInstances #-}
+{-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE TypeOperators #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
 {-# LANGUAGE TypeFamilies #-}
 maybeDowncastArinc p r 
     | checkSelector p r = Just $ reinterpret r
     | otherwise         = Nothing
+
+instance Selector $(natProxyT 12) where
+    type Raw $(natProxyT 12) = RawArinc
+    type Interpretation $(natProxyT 12) = ReprStruct W32 [N8 , N24]
+    downcast  = maybeDowncastArinc 
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