ghc-8.2.2: The GHC API

Safe Haskell | None
Language | Haskell2010

ConLike

Synopsis

- data ConLike
  - = RealDataCon DataCon
  - | PatSynCon PatSyn
- conLikeArity :: ConLike -> Arity
- conLikeFieldLabels :: ConLike -> [FieldLabel]
- conLikeInstOrigArgTys :: ConLike -> [Type] -> [Type]
- conLikeExTyVars :: ConLike -> [TyVar]
- conLikeName :: ConLike -> Name
- conLikeStupidTheta :: ConLike -> ThetaType
- conLikeWrapId_maybe :: ConLike -> Maybe Id
- conLikeImplBangs :: ConLike -> [HsImplBang]
- conLikeFullSig :: ConLike -> ([TyVar], [TyVar], [EqSpec], ThetaType, ThetaType, [Type], Type)
- conLikeResTy :: ConLike -> [Type] -> Type
- conLikeFieldType :: ConLike -> FieldLabelString -> Type
- conLikesWithFields :: [ConLike] -> [FieldLabelString] -> [ConLike]
- conLikeIsInfix :: ConLike -> Bool

# Documentation

data ConLike #

A constructor-like thing

Constructors

RealDataCon DataCon |
PatSynCon PatSyn |

Instances

Eq ConLike # |
Methods (==) :: ConLike -> ConLike -> Bool # (/=) :: ConLike -> ConLike -> Bool #
Data ConLike # |

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> ConLike -> c ConLike Source #

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c ConLike Source #

toConstr :: ConLike -> Constr Source #

dataTypeOf :: ConLike -> DataType Source #

dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c ConLike) Source #

dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c ConLike) Source #

gmapT :: (forall b. Data b => b -> b) -> ConLike -> ConLike Source #

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> ConLike -> r Source #

gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> ConLike -> r Source #

gmapQ :: (forall d. Data d => d -> u) -> ConLike -> [u] Source #

gmapQi :: Int -> (forall d. Data d => d -> u) -> ConLike -> u Source #

gmapM :: Monad m => (forall d. Data d => d -> m d) -> ConLike -> m ConLike Source #

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> ConLike -> m ConLike Source #

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> ConLike -> m ConLike Source #

OutputableBndr ConLike # |
Methods pprBndr :: BindingSite -> ConLike -> SDoc # pprPrefixOcc :: ConLike -> SDoc # pprInfixOcc :: ConLike -> SDoc # bndrIsJoin_maybe :: ConLike -> Maybe Int #
Outputable ConLike # |
Methods ppr :: ConLike -> SDoc # pprPrec :: Rational -> ConLike -> SDoc #
Uniquable ConLike # |
Methods getUnique :: ConLike -> Unique #
NamedThing ConLike # |
Methods getOccName :: ConLike -> OccName # getName :: ConLike -> Name #

conLikeArity :: ConLike -> Arity #

Number of arguments

conLikeFieldLabels :: ConLike -> [FieldLabel] #

Names of fields used for selectors

conLikeInstOrigArgTys :: ConLike -> [Type] -> [Type] #

Returns just the instantiated value argument types of a `ConLike`, (excluding dictionary args)

conLikeExTyVars :: ConLike -> [TyVar] #

Existentially quantified type variables

conLikeName :: ConLike -> Name #

conLikeStupidTheta :: ConLike -> ThetaType #

The "stupid theta" of the `ConLike`, such as `data Eq a` in:

    data Eq a => T a = ...

It is empty for `PatSynCon` as they do not allow such contexts.

conLikeWrapId_maybe :: ConLike -> Maybe Id #

Returns the `Id` of the wrapper. This is also known as the builder in some contexts. The value is Nothing only in the case of unidirectional pattern synonyms.

conLikeImplBangs :: ConLike -> [HsImplBang] #

Returns the strictness information for each constructor

conLikeFullSig :: ConLike -> ([TyVar], [TyVar], [EqSpec], ThetaType, ThetaType, [Type], Type) #

The "full signature" of the `ConLike` returns, in order:

1) The universally quantified type variables

2) The existentially quantified type variables

3) The equality specification

4) The provided theta (the constraints provided by a match)

5) The required theta (the constraints required for a match)

6) The original argument types (i.e. before any change of the representation of the type)

7) The original result type

conLikeResTy :: ConLike -> [Type] -> Type #

Returns the type of the whole pattern

conLikeFieldType :: ConLike -> FieldLabelString -> Type #

Extract the type for any given labelled field of the `ConLike`

conLikesWithFields :: [ConLike] -> [FieldLabelString] -> [ConLike] #

The ConLikes that have *all* the given fields

conLikeIsInfix :: ConLike -> Bool #