base-4.8.1.0: Basic libraries

Copyright | (c) The University of Glasgow, CWI 2001--2011
License | BSD-style (see the file libraries/base/LICENSE)
Safe Haskell | Trustworthy
Language | Haskell2010

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

- data Proxy t = Proxy
- data TypeRep = TypeRep !Fingerprint TyCon [KindRep] [TypeRep]
- type KindRep = TypeRep
- data Fingerprint = Fingerprint !Word64 !Word64
- typeOf :: forall a. Typeable a => a -> TypeRep
- typeOf1 :: forall t a. Typeable t => t a -> TypeRep
- typeOf2 :: forall t a b. Typeable t => t a b -> TypeRep
- typeOf3 :: forall t a b c. Typeable t => t a b c -> TypeRep
- typeOf4 :: forall t a b c d. Typeable t => t a b c d -> TypeRep
- typeOf5 :: forall t a b c d e. Typeable t => t a b c d e -> TypeRep
- typeOf6 :: forall t a b c d e f. Typeable t => t a b c d e f -> TypeRep
- typeOf7 :: forall t a b c d e f g. Typeable t => t a b c d e f g -> TypeRep
- type Typeable1 a = Typeable a
- type Typeable2 a = Typeable a
- type Typeable3 a = Typeable a
- type Typeable4 a = Typeable a
- type Typeable5 a = Typeable a
- type Typeable6 a = Typeable a
- type Typeable7 a = Typeable a
- data TyCon = TyCon {
  - tyConFingerprint :: !Fingerprint
  - tyConPackage :: String
  - tyConModule :: String
  - tyConName :: String
  }
- typeRep :: forall proxy a. Typeable a => proxy a -> TypeRep
- mkTyCon :: Word64# -> Word64# -> String -> String -> String -> TyCon
- mkTyCon3 :: String -> String -> String -> TyCon
- mkTyConApp :: TyCon -> [TypeRep] -> TypeRep
- mkPolyTyConApp :: TyCon -> [KindRep] -> [TypeRep] -> TypeRep
- mkAppTy :: TypeRep -> TypeRep -> TypeRep
- typeRepTyCon :: TypeRep -> TyCon
- class Typeable a where
  - typeRep# :: Proxy# a -> TypeRep
- mkFunTy :: TypeRep -> TypeRep -> TypeRep
- splitTyConApp :: TypeRep -> (TyCon, [TypeRep])
- splitPolyTyConApp :: TypeRep -> (TyCon, [KindRep], [TypeRep])
- funResultTy :: TypeRep -> TypeRep -> Maybe TypeRep
- typeRepArgs :: TypeRep -> [TypeRep]
- typeRepFingerprint :: TypeRep -> Fingerprint
- rnfTypeRep :: TypeRep -> ()
- showsTypeRep :: TypeRep -> ShowS
- tyConString :: TyCon -> String
- rnfTyCon :: TyCon -> ()
- listTc :: TyCon
- funTc :: TyCon
- typeRepKinds :: TypeRep -> [KindRep]
- typeLitTypeRep :: String -> TypeRep

# 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

Eq TypeRep |
Ord TypeRep |
Show TypeRep |

type KindRep = TypeRep Source

data Fingerprint Source

Constructors

Fingerprint !Word64 !Word64 |

Instances

Eq Fingerprint |
Ord Fingerprint |
Show Fingerprint |
Storable Fingerprint |

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

Eq TyCon |
Ord TyCon |
Show TyCon |

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 :: Word64# -> Word64# -> 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.