Classes.hs

-- Note: this is an automatically generated file. Do not edit.
-- | Term decoders for hydra.classes

module Hydra.Decode.Classes where
import qualified Hydra.Classes as Classes
import qualified Hydra.Core as Core
import qualified Hydra.Errors as Errors
import qualified Hydra.Extract.Core as ExtractCore
import qualified Hydra.Graph as Graph
import qualified Hydra.Lib.Eithers as Eithers
import qualified Hydra.Lib.Maps as Maps
import qualified Hydra.Lib.Maybes as Maybes
import qualified Hydra.Lib.Strings as Strings
import Prelude hiding  (Enum, Ordering, decodeFloat, encodeFloat, fail, map, pure, sum)
import qualified Data.Scientific as Sci
typeClass :: Graph.Graph -> Core.Term -> Either Errors.DecodingError Classes.TypeClass
typeClass cx raw =
    Eithers.either (\err -> Left err) (\stripped -> case stripped of
      Core.TermInject v0 ->
        let field = Core.injectionField v0
            fname = Core.fieldName field
            fterm = Core.fieldTerm field
            variantMap =
                    Maps.fromList [
                      (Core.Name "equality", (\input -> Eithers.map (\t -> Classes.TypeClassEquality) (ExtractCore.decodeUnit cx input))),
                      (Core.Name "ordering", (\input -> Eithers.map (\t -> Classes.TypeClassOrdering) (ExtractCore.decodeUnit cx input)))]
        in (Maybes.maybe (Left (Errors.DecodingError (Strings.cat [
          "no such field ",
          (Core.unName fname),
          " in union"]))) (\f -> f fterm) (Maps.lookup fname variantMap))
      _ -> Left (Errors.DecodingError "expected union")) (ExtractCore.stripWithDecodingError cx raw)