Copyright	(c) The University of Glasgow CWI 2001--2015
License	BSD-style (see the file libraries/base/LICENSE)
Safe Haskell	Safe
Language	Haskell2010

Type.Reflection.Unsafe

Contents

Type representations
Kind representations
Type constructors

Description

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.

Synopsis

data TypeRep (a :: k)
mkTrApp :: forall k1 k2 (a :: k1 -> k2) (b :: k1). TypeRep (a :: k1 -> k2) -> TypeRep (b :: k1) -> TypeRep (a b)
mkTyCon :: String -> String -> String -> Int -> KindRep -> TyCon
typeRepFingerprint :: TypeRep a -> Fingerprint
someTypeRepFingerprint :: SomeTypeRep -> Fingerprint
data KindRep where
- KindRepTyConApp TyCon [KindRep]
- KindRepVar !KindBndr
- KindRepApp KindRep KindRep
- KindRepFun KindRep KindRep
- KindRepTYPE !RuntimeRep
- KindRepTypeLitS TypeLitSort Addr#
- KindRepTypeLitD TypeLitSort [Char]
- pattern KindRepTypeLit :: TypeLitSort -> String -> KindRep
data TypeLitSort
- = TypeLitSymbol
- | TypeLitNat
data TyCon
mkTrCon :: forall k (a :: k). TyCon -> [SomeTypeRep] -> TypeRep a
tyConKindRep :: TyCon -> KindRep
tyConKindArgs :: TyCon -> Int
tyConFingerprint :: TyCon -> Fingerprint

Type representations

data TypeRep (a :: k) #

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

Instances

TestEquality (TypeRep :: k -> Type) #
Instance details Defined in Data.Typeable.Internal Methods testEquality :: TypeRep a -> TypeRep b -> Maybe (a :~: b) #
Eq (TypeRep a) #	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) #	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 #
Show (TypeRep a) #
Instance details Defined in Data.Typeable.Internal Methods showsPrec :: Int -> TypeRep a -> ShowS # show :: TypeRep a -> String # showList :: [TypeRep a] -> ShowS #

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

Construct a representation for a type application.

mkTyCon #

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 #

Observe the Fingerprint of a type representation

Since: base-4.8.0.0

someTypeRepFingerprint :: SomeTypeRep -> Fingerprint #

Kind representations

data KindRep Source #

The representation produced by GHC for conjuring up the kind of a TypeRep. See Note [Representing TyCon kinds: KindRep] in TcTypeable.

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

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

data TypeLitSort Source #

Constructors

TypeLitSymbol
TypeLitNat

Instances

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

Type constructors

data TyCon Source #

Instances

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 #
Show TyCon #	Since: base-2.1
Instance details Defined in GHC.Show Methods showsPrec :: Int -> TyCon -> ShowS # show :: TyCon -> String # showList :: [TyCon] -> ShowS #

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

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 #

tyConKindArgs :: TyCon -> Int #

tyConFingerprint :: TyCon -> Fingerprint #