ghc-9.2.3: The GHC API
Safe HaskellSafe-Inferred
LanguageHaskell2010

GHC.Tc.Deriv.Functor

Description

The deriving code for the Functor, Foldable, and Traversable classes

Documentation

data FFoldType a Source #

Constructors

FT 

Fields

  • ft_triv :: a

    Does not contain variable

  • ft_var :: a

    The variable itself

  • ft_co_var :: a

    The variable itself, contravariantly

  • ft_fun :: a -> a -> a

    Function type

  • ft_tup :: TyCon -> [a] -> a

    Tuple type. The [a] is the result of folding over the arguments of the tuple.

  • ft_ty_app :: Type -> Type -> a -> a

    Type app, variable only in last argument. The two Types are the function and argument parts of fun_ty arg_ty, respectively.

  • ft_bad_app :: a

    Type app, variable other than in last argument

  • ft_forall :: TcTyVar -> a -> a

    Forall type

functorLikeTraverse Source #

Arguments

:: forall a. TyVar

Variable to look for

-> FFoldType a

How to fold

-> Type

Type to process

-> a