never executed always true always false

    1 {-# LANGUAGE DeriveGeneric, DeriveDataTypeable, DeriveFunctor, DeriveTraversable, DeriveFoldable #-}
    2 
    3 module Conjure.Language.Expression.Op.AllDiff 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 OpAllDiff x = OpAllDiff x
   15     deriving (Eq, Ord, Show, Data, Functor, Traversable, Foldable, Typeable, Generic)
   16 
   17 instance Serialize x => Serialize (OpAllDiff x)
   18 instance Hashable  x => Hashable  (OpAllDiff x)
   19 instance ToJSON    x => ToJSON    (OpAllDiff x) where toJSON = genericToJSON jsonOptions
   20 instance FromJSON  x => FromJSON  (OpAllDiff x) where parseJSON = genericParseJSON jsonOptions
   21 
   22 instance (TypeOf x, Pretty x) => TypeOf (OpAllDiff x) where
   23     typeOf p@(OpAllDiff x) = do
   24         ty <- typeOf x
   25         case ty of
   26             TypeList{} -> return TypeBool
   27             TypeMatrix{} -> return TypeBool
   28             _ -> raiseTypeError p
   29 
   30 instance SimplifyOp OpAllDiff x where
   31     simplifyOp (OpAllDiff x)
   32         | Just xs <- listOut x
   33         , length xs == 1
   34         = return $ fromBool True
   35     simplifyOp _ = na "simplifyOp{OpAllDiff}"
   36 
   37 instance Pretty x => Pretty (OpAllDiff x) where
   38     prettyPrec _ (OpAllDiff a) = "allDiff" <> prParens (pretty a)
   39 
   40 instance (VarSymBreakingDescription x, ExpressionLike x) => VarSymBreakingDescription (OpAllDiff x) where
   41     varSymBreakingDescription (OpAllDiff x) | Just xs <- listOut x = JSON.Object $ KM.fromList
   42         [ ("type", JSON.String "OpAllDiff")
   43         , ("children", JSON.Array $ V.fromList $ map varSymBreakingDescription xs)
   44         , ("symmetricChildren", JSON.Bool True)
   45         ]
   46     varSymBreakingDescription (OpAllDiff x) = JSON.Object $ KM.fromList
   47         [ ("type", JSON.String "OpAllDiff")
   48         , ("children", varSymBreakingDescription x)
   49         ]