never executed always true always false

    1 {-# LANGUAGE DeriveGeneric, DeriveDataTypeable, DeriveFunctor, DeriveTraversable, DeriveFoldable #-}
    2 
    3 module Conjure.Language.Expression.Op.AllDiffExcept 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 OpAllDiffExcept x = OpAllDiffExcept x x
   15     deriving (Eq, Ord, Show, Data, Functor, Traversable, Foldable, Typeable, Generic)
   16 
   17 instance Serialize x => Serialize (OpAllDiffExcept x)
   18 instance Hashable  x => Hashable  (OpAllDiffExcept x)
   19 instance ToJSON    x => ToJSON    (OpAllDiffExcept x) where toJSON = genericToJSON jsonOptions
   20 instance FromJSON  x => FromJSON  (OpAllDiffExcept x) where parseJSON = genericParseJSON jsonOptions
   21 
   22 instance (TypeOf x, Pretty x) => TypeOf (OpAllDiffExcept x) where
   23     typeOf p@(OpAllDiffExcept x n) = do
   24         tyX <- typeOf x
   25         tyN <- typeOf n
   26         case tyN of
   27             TypeInt TagInt -> return ()
   28             TypeInt (TagEnum _) -> return ()
   29             _ -> raiseTypeError p
   30         case tyX of
   31             TypeList{} -> return TypeBool
   32             TypeMatrix{} -> return TypeBool
   33             _ -> raiseTypeError p
   34 
   35 instance SimplifyOp OpAllDiffExcept x where
   36     simplifyOp _ = na "simplifyOp{OpAllDiffExcept}"
   37 
   38 instance Pretty x => Pretty (OpAllDiffExcept x) where
   39     prettyPrec _ (OpAllDiffExcept a b) = "alldifferent_except" <> prettyList prParens "," [a, b]
   40 
   41 instance (VarSymBreakingDescription x, ExpressionLike x) => VarSymBreakingDescription (OpAllDiffExcept x) where
   42     varSymBreakingDescription (OpAllDiffExcept x y) = JSON.Object $ KM.fromList
   43         [ ("type", JSON.String "OpAllDiffExcept")
   44         , ("children", JSON.Array $ V.fromList [ varSymBreakingDescription x
   45                                                , varSymBreakingDescription y
   46                                                ])
   47         ]