{- | Fortran complex data type.

The complex data type is a simple layer on top of reals. We reuse the type and
value representation from reals, but for convenience, we provide a newtype
wrapper to enable writing a 'FKinded' instance for the complex type.

TODO candidate for improving. other ways of writing, name is long & poor.
alternatively, could enforce usage of this
-}

module Language.Fortran.Repr.Type.Scalar.Complex where

import Language.Fortran.Repr.Type.Scalar.Common
import Language.Fortran.Repr.Type.Scalar.Real

import GHC.Generics ( Generic )
import Data.Data ( Data )

newtype FTComplexWrapper = FTComplexWrapper { FTComplexWrapper -> FTReal
unFTComplexWrapper :: FTReal }
    deriving stock (forall x. Rep FTComplexWrapper x -> FTComplexWrapper
forall x. FTComplexWrapper -> Rep FTComplexWrapper x
forall a.
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instance FKinded FTComplexWrapper where
    type FKindOf ('FTComplexWrapper 'FTReal4) = 8
    type FKindOf ('FTComplexWrapper 'FTReal8) = 16
    type FKindDefault = 'FTComplexWrapper 'FTReal4
    parseFKind :: FKindTerm -> Maybe FTComplexWrapper
parseFKind = \case FKindTerm
8  -> forall a. a -> Maybe a
Just forall a b. (a -> b) -> a -> b
$ FTReal -> FTComplexWrapper
FTComplexWrapper FTReal
FTReal4
                       FKindTerm
16 -> forall a. a -> Maybe a
Just forall a b. (a -> b) -> a -> b
$ FTReal -> FTComplexWrapper
FTComplexWrapper FTReal
FTReal8
                       FKindTerm
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Nothing
    printFKind :: FTComplexWrapper -> FKindTerm
printFKind = \case
      FTComplexWrapper FTReal
FTReal4 -> FKindTerm
8
      FTComplexWrapper FTReal
FTReal8 -> FKindTerm
16