never executed always true always false

    1 {-# LANGUAGE DeriveGeneric, DeriveDataTypeable, DeriveFunctor, DeriveTraversable, DeriveFoldable #-}
    2 
    3 module Conjure.Language.Expression.Op.ToInt where
    4 
    5 import Conjure.Prelude
    6 import Conjure.Language.Expression.Op.Internal.Common
    7 
    8 import qualified Data.Aeson as JSON             -- aeson
    9 import qualified Data.Aeson.KeyMap as KM
   10 
   11 import qualified Data.Vector as V               -- vector
   12 
   13 
   14 data OpToInt x = OpToInt x
   15     deriving (Eq, Ord, Show, Data, Functor, Traversable, Foldable, Typeable, Generic)
   16 
   17 instance Serialize x => Serialize (OpToInt x)
   18 instance Hashable  x => Hashable  (OpToInt x)
   19 instance ToJSON    x => ToJSON    (OpToInt x) where toJSON = genericToJSON jsonOptions
   20 instance FromJSON  x => FromJSON  (OpToInt x) where parseJSON = genericParseJSON jsonOptions
   21 
   22 instance (TypeOf x, Pretty x) => TypeOf (OpToInt x) where
   23     typeOf p@(OpToInt x) = do
   24         ty <- typeOf x
   25         case ty of
   26             TypeBool -> return $ TypeInt TagInt
   27             _ -> raiseTypeError $ vcat
   28                 [ pretty p
   29                 , "Expected type bool."
   30                 , "But got:" <+> pretty ty
   31                 ]
   32 
   33 instance SimplifyOp OpToInt x where
   34     simplifyOp _ = na "simplifyOp{OpToInt}"
   35 
   36 instance Pretty x => Pretty (OpToInt x) where
   37     prettyPrec _ (OpToInt a) = "toInt" <> prParens (pretty a)
   38 
   39 instance VarSymBreakingDescription x => VarSymBreakingDescription (OpToInt x) where
   40     varSymBreakingDescription (OpToInt a) = JSON.Object $ KM.fromList
   41         [ ("type", JSON.String "OpToInt")
   42         , ("children", JSON.Array $ V.fromList
   43             [ varSymBreakingDescription a
   44             ])
   45         ]