GHC.Core.ConLike

ghc-9.2.8: The GHC API

Safe Haskell | Safe-Inferred
Language | Haskell2010

GHC.Core.ConLike

Synopsis

- data ConLike
  - = RealDataCon DataCon
  - | PatSynCon PatSyn
- isVanillaConLike :: ConLike -> Bool
- conLikeArity :: ConLike -> Arity
- conLikeFieldLabels :: ConLike -> [FieldLabel]
- conLikeInstOrigArgTys :: ConLike -> [Type] -> [Scaled Type]
- conLikeUserTyVarBinders :: ConLike -> [InvisTVBinder]
- conLikeExTyCoVars :: ConLike -> [TyCoVar]
- conLikeName :: ConLike -> Name
- conLikeStupidTheta :: ConLike -> ThetaType
- conLikeImplBangs :: ConLike -> [HsImplBang]
- conLikeFullSig :: ConLike -> ([TyVar], [TyCoVar], [EqSpec], ThetaType, ThetaType, [Scaled Type], Type)
- conLikeResTy :: ConLike -> [Type] -> Type
- conLikeFieldType :: ConLike -> FieldLabelString -> Type
- conLikesWithFields :: [ConLike] -> [FieldLabelString] -> [ConLike]
- conLikeIsInfix :: ConLike -> Bool
- conLikeHasBuilder :: ConLike -> Bool

# Documentation

data ConLike Source #

A constructor-like thing

Constructors

RealDataCon DataCon |
PatSynCon PatSyn |

#### Instances

Instances details

Data ConLike Source # |
Instance details Defined in GHC.Core.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 :: forall r r'. (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 #
NamedThing ConLike Source # |
Instance details Defined in GHC.Core.ConLike Methods getOccName :: ConLike -> OccName Source # getName :: ConLike -> Name Source #
Uniquable ConLike Source # |
Instance details Defined in GHC.Core.ConLike Methods getUnique :: ConLike -> Unique Source #
Outputable ConLike Source # |
Instance details Defined in GHC.Core.ConLike Methods ppr :: ConLike -> SDoc Source #
OutputableBndr ConLike Source # |
Instance details Defined in GHC.Core.ConLike Methods pprBndr :: BindingSite -> ConLike -> SDoc Source # pprPrefixOcc :: ConLike -> SDoc Source # pprInfixOcc :: ConLike -> SDoc Source # bndrIsJoin_maybe :: ConLike -> Maybe Int Source #
Eq ConLike Source # |
Instance details Defined in GHC.Core.ConLike Methods (==) :: ConLike -> ConLike -> Bool # (/=) :: ConLike -> ConLike -> Bool #
type Anno ConLike Source # |
Instance details Defined in GHC.Hs.Pat type Anno ConLike = SrcSpanAnnN

isVanillaConLike :: ConLike -> Bool Source #

Is this a 'vanilla' constructor-like thing (no existentials, no provided constraints)?

conLikeArity :: ConLike -> Arity Source #

Number of arguments

conLikeFieldLabels :: ConLike -> [FieldLabel] Source #

Names of fields used for selectors

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

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

conLikeUserTyVarBinders :: ConLike -> [InvisTVBinder] Source #

`TyVarBinder`s for the type variables of the `ConLike`. For pattern synonyms, this will always consist of the universally quantified variables followed by the existentially quantified type variables. For data constructors, the situation is slightly more complicated—see `Note [DataCon user type variable binders]` in GHC.Core.DataCon.

conLikeExTyCoVars :: ConLike -> [TyCoVar] Source #

Existentially quantified type/coercion variables

conLikeName :: ConLike -> Name Source #

conLikeStupidTheta :: ConLike -> ThetaType Source #

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.

conLikeImplBangs :: ConLike -> [HsImplBang] Source #

Returns the strictness information for each constructor

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

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

1) The universally quantified type variables

2) The existentially quantified type/coercion 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 Source #

Returns the type of the whole pattern

conLikeFieldType :: ConLike -> FieldLabelString -> Type Source #

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

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

The ConLikes that have *all* the given fields

conLikeIsInfix :: ConLike -> Bool Source #

conLikeHasBuilder :: ConLike -> Bool Source #

`conLikeHasBuilder` returns True except for uni-directional pattern synonyms, which have no builder