base-4.8.1.0: Basic libraries

Copyright(c) The University of Glasgow, CWI 2001--2011
LicenseBSD-style (see the file libraries/base/LICENSE)
Safe HaskellTrustworthy
LanguageHaskell2010

Data.Typeable.Internal

Description

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

Synopsis

Documentation

data Proxy t Source

A concrete, poly-kinded proxy type

Constructors

Proxy 

Instances

Monad (Proxy *) 
Functor (Proxy *) 
Applicative (Proxy *) 
Foldable (Proxy *) 
Traversable (Proxy *) 
Bounded (Proxy k s) 
Enum (Proxy k s) 
Eq (Proxy k s) 
Data t => Data (Proxy * t) 
Ord (Proxy k s) 
Read (Proxy k s) 
Show (Proxy k s) 
Ix (Proxy k s) 
Generic (Proxy * t) 
Monoid (Proxy k s) 
type Rep (Proxy k t) 

data TypeRep Source

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

Constructors

TypeRep !Fingerprint TyCon [KindRep] [TypeRep] 

Instances

type KindRep = TypeRep Source

data Fingerprint Source

Constructors

Fingerprint !Word64 !Word64 

Instances

typeOf :: forall a. Typeable a => a -> TypeRep Source

typeOf1 :: forall t a. Typeable t => t a -> TypeRep Source

typeOf2 :: forall t a b. Typeable t => t a b -> TypeRep Source

typeOf3 :: forall t a b c. Typeable t => t a b c -> TypeRep Source

typeOf4 :: forall t a b c d. Typeable t => t a b c d -> TypeRep Source

typeOf5 :: forall t a b c d e. Typeable t => t a b c d e -> TypeRep Source

typeOf6 :: forall t a b c d e f. Typeable t => t a b c d e f -> TypeRep Source

typeOf7 :: forall t a b c d e f g. Typeable t => t a b c d e f g -> TypeRep Source

type Typeable1 a = Typeable a Source

Deprecated: renamed to Typeable

type Typeable2 a = Typeable a Source

Deprecated: renamed to Typeable

type Typeable3 a = Typeable a Source

Deprecated: renamed to Typeable

type Typeable4 a = Typeable a Source

Deprecated: renamed to Typeable

type Typeable5 a = Typeable a Source

Deprecated: renamed to Typeable

type Typeable6 a = Typeable a Source

Deprecated: renamed to Typeable

type Typeable7 a = Typeable a Source

Deprecated: renamed to Typeable

data TyCon Source

An abstract representation of a type constructor. TyCon objects can be built using mkTyCon.

Constructors

TyCon 

Fields

tyConFingerprint :: !Fingerprint

Since: 4.8.0.0

tyConPackage :: String

Since: 4.5.0.0

tyConModule :: String

Since: 4.5.0.0

tyConName :: String

Since: 4.5.0.0

Instances

typeRep :: forall proxy a. Typeable a => proxy a -> TypeRep Source

Takes a value of type a and returns a concrete representation of that type.

Since: 4.7.0.0

mkTyCon :: Word# -> Word# -> String -> String -> String -> TyCon Source

mkTyCon3 Source

Arguments

:: String

package name

-> String

module name

-> String

the name of the type constructor

-> TyCon

A unique TyCon object

Builds a TyCon object representing a type constructor. An implementation of Data.Typeable should ensure that the following holds:

 A==A' ^ B==B' ^ C==C' ==> mkTyCon A B C == mkTyCon A' B' C'

mkTyConApp :: TyCon -> [TypeRep] -> TypeRep Source

Applies a monomorphic type constructor to a sequence of types

mkPolyTyConApp :: TyCon -> [KindRep] -> [TypeRep] -> TypeRep Source

Applies a polymorhic type constructor to a sequence of kinds and types

mkAppTy :: TypeRep -> TypeRep -> TypeRep Source

Adds a TypeRep argument to a TypeRep.

typeRepTyCon :: TypeRep -> TyCon Source

Observe the type constructor of a type representation

class Typeable a where Source

The class Typeable allows a concrete representation of a type to be calculated.

Methods

typeRep# :: Proxy# a -> TypeRep Source

mkFunTy :: TypeRep -> TypeRep -> TypeRep Source

A special case of mkTyConApp, which applies the function type constructor to a pair of types.

splitTyConApp :: TypeRep -> (TyCon, [TypeRep]) Source

Splits a type constructor application. Note that if the type construcotr is polymorphic, this will not return the kinds that were used. See splitPolyTyConApp if you need all parts.

splitPolyTyConApp :: TypeRep -> (TyCon, [KindRep], [TypeRep]) Source

Split a type constructor application

funResultTy :: TypeRep -> TypeRep -> Maybe TypeRep Source

Applies a type to a function type. Returns: Just u if the first argument represents a function of type t -> u and the second argument represents a function of type t. Otherwise, returns Nothing.

typeRepArgs :: TypeRep -> [TypeRep] Source

Observe the argument types of a type representation

typeRepFingerprint :: TypeRep -> Fingerprint Source

Observe the Fingerprint of a type representation

Since: 4.8.0.0

rnfTypeRep :: TypeRep -> () Source

Helper to fully evaluate TypeRep for use as NFData(rnf) implementation

Since: 4.8.0.0

showsTypeRep :: TypeRep -> ShowS Source

tyConString :: TyCon -> String Source

Deprecated: renamed to tyConName; tyConModule and tyConPackage are also available.

Observe string encoding of a type representation

rnfTyCon :: TyCon -> () Source

Helper to fully evaluate TyCon for use as NFData(rnf) implementation

Since: 4.8.0.0

listTc :: TyCon Source

funTc :: TyCon Source

typeRepKinds :: TypeRep -> [KindRep] Source

Observe the argument kinds of a type representation

typeLitTypeRep :: String -> TypeRep Source

An internal function, to make representations for type literals.