Type.Reflection.Unsafe

The representations of the types TyCon and TypeRep, and the function mkTyCon which is used by derived instances of Typeable to construct TyCons.

Be warned, these functions can be used to construct ill-kinded type representations.

Type representations

data TypeRep a Source #

A concrete representation of a (monomorphic) type. TypeRep supports reasonably efficient equality.

Instances

Instances details

TestEquality (TypeRep :: k -> Type) Source #
Instance details Defined in Data.Typeable.Internal Methods testEquality :: forall (a :: k0) (b :: k0). TypeRep a -> TypeRep b -> Maybe (a :~: b) Source #
Show (TypeRep a) Source #
Instance details Defined in Data.Typeable.Internal Methods showsPrec :: Int -> TypeRep a -> ShowS Source # show :: TypeRep a -> String Source # showList :: [TypeRep a] -> ShowS Source #
Eq (TypeRep a) Source #	Since: base-2.1
Instance details Defined in Data.Typeable.Internal Methods (==) :: TypeRep a -> TypeRep a -> Bool Source # (/=) :: TypeRep a -> TypeRep a -> Bool Source #
Ord (TypeRep a) Source #	Since: base-4.4.0.0
Instance details Defined in Data.Typeable.Internal Methods compare :: TypeRep a -> TypeRep a -> Ordering Source # (<) :: TypeRep a -> TypeRep a -> Bool Source # (<=) :: TypeRep a -> TypeRep a -> Bool Source # (>) :: TypeRep a -> TypeRep a -> Bool Source # (>=) :: TypeRep a -> TypeRep a -> Bool Source # max :: TypeRep a -> TypeRep a -> TypeRep a Source # min :: TypeRep a -> TypeRep a -> TypeRep a Source #

mkTrApp :: forall k1 k2 (a :: k1 -> k2) (b :: k1). TypeRep (a :: k1 -> k2) -> TypeRep (b :: k1) -> TypeRep (a b) Source #

Construct a representation for a type application.

mkTyCon Source #

Arguments

:: String	package name
-> String	module name
-> String	the name of the type constructor
-> Int	number of kind variables
-> KindRep	kind representation
-> TyCon	A unique `TyCon` object Used when the strings are dynamically allocated, eg from binary deserialisation

Exquisitely unsafe.

typeRepFingerprint :: TypeRep a -> Fingerprint Source #

Observe the Fingerprint of a type representation

Since: base-4.8.0.0

someTypeRepFingerprint :: SomeTypeRep -> Fingerprint Source #

Kind representations

data KindRep Source #

The representation produced by GHC for conjuring up the kind of a TypeRep.

Constructors

KindRepTyConApp TyCon [KindRep]
KindRepVar !KindBndr
KindRepApp KindRep KindRep
KindRepFun KindRep KindRep
KindRepTYPE !RuntimeRep
KindRepTypeLitS TypeLitSort Addr#
KindRepTypeLitD TypeLitSort [Char]

Bundled Patterns

pattern KindRepTypeLit :: TypeLitSort -> String -> KindRep

Instances

Instances details

Show KindRep Source #
Instance details Defined in GHC.Show Methods showsPrec :: Int -> KindRep -> ShowS Source # show :: KindRep -> String Source # showList :: [KindRep] -> ShowS Source #

data TypeLitSort Source #

Constructors

TypeLitSymbol
TypeLitNat
TypeLitChar

Instances

Instances details

Show TypeLitSort Source #	Since: base-4.11.0.0
Instance details Defined in GHC.Show Methods showsPrec :: Int -> TypeLitSort -> ShowS Source # show :: TypeLitSort -> String Source # showList :: [TypeLitSort] -> ShowS Source #

Type constructors

data TyCon Source #

Instances

Instances details

Show TyCon Source #	Since: base-2.1
Instance details Defined in GHC.Show Methods showsPrec :: Int -> TyCon -> ShowS Source # show :: TyCon -> String Source # showList :: [TyCon] -> ShowS Source #
Eq TyCon
Instance details Defined in GHC.Classes Methods (==) :: TyCon -> TyCon -> Bool Source # (/=) :: TyCon -> TyCon -> Bool Source #
Ord TyCon
Instance details Defined in GHC.Classes Methods compare :: TyCon -> TyCon -> Ordering Source # (<) :: TyCon -> TyCon -> Bool Source # (<=) :: TyCon -> TyCon -> Bool Source # (>) :: TyCon -> TyCon -> Bool Source # (>=) :: TyCon -> TyCon -> Bool Source # max :: TyCon -> TyCon -> TyCon Source # min :: TyCon -> TyCon -> TyCon Source #

mkTrCon :: forall k (a :: k). TyCon -> [SomeTypeRep] -> TypeRep a Source #

Construct a representation for a type constructor applied at a monomorphic kind.

Note that this is unsafe as it allows you to construct ill-kinded types.

tyConKindRep :: TyCon -> KindRep Source #

tyConKindArgs :: TyCon -> Int Source #

tyConFingerprint :: TyCon -> Fingerprint Source #