Safe Haskell	None
Language	GHC2021

GHC.Core.Class

Synopsis

data Class
type ClassOpItem = (Id, DefMethInfo)
data ClassATItem = ATI TyCon (Maybe (Type, TyFamEqnValidityInfo))
data TyFamEqnValidityInfo
- = NoVI
- | VI {
  - vi_loc :: SrcSpan
  - vi_qtvs :: [TcTyVar]
  - vi_non_user_tvs :: TyVarSet
  - vi_pats :: [Type]
  - vi_rhs :: Type
  }
type ClassMinimalDef = BooleanFormula Name
type DefMethInfo = Maybe (Name, DefMethSpec Type)
pprDefMethInfo :: DefMethInfo -> SDoc
type FunDep a = ([a], [a])
pprFundeps :: Outputable a => [FunDep a] -> SDoc
pprFunDep :: Outputable a => FunDep a -> SDoc
mkClass :: Name -> [TyVar] -> [FunDep TyVar] -> [PredType] -> [Id] -> [ClassATItem] -> [ClassOpItem] -> ClassMinimalDef -> TyCon -> Class
mkAbstractClass :: Name -> [TyVar] -> [FunDep TyVar] -> TyCon -> Class
classTyVars :: Class -> [TyVar]
classArity :: Class -> Arity
classKey :: Class -> Unique
className :: Class -> Name
classATs :: Class -> [TyCon]
classATItems :: Class -> [ClassATItem]
classTyCon :: Class -> TyCon
classMethods :: Class -> [Id]
classOpItems :: Class -> [ClassOpItem]
classBigSig :: Class -> ([TyVar], [PredType], [Id], [ClassOpItem])
classExtraBigSig :: Class -> ([TyVar], [FunDep TyVar], [PredType], [Id], [ClassATItem], [ClassOpItem])
classTvsFds :: Class -> ([TyVar], [FunDep TyVar])
classSCTheta :: Class -> [PredType]
classHasSCs :: Class -> Bool
classAllSelIds :: Class -> [Id]
classSCSelId :: Class -> Int -> Id
classSCSelIds :: Class -> [Id]
classMinimalDef :: Class -> ClassMinimalDef
classHasFds :: Class -> Bool
isAbstractClass :: Class -> Bool

Documentation

data Class Source #

Instances

Instances details

NamedThing Class Source #
Instance details Defined in GHC.Core.Class Methods getOccName :: Class -> OccName Source # getName :: Class -> Name Source #
Uniquable Class Source #
Instance details Defined in GHC.Core.Class Methods getUnique :: Class -> Unique Source #
Outputable Class Source #
Instance details Defined in GHC.Core.Class Methods ppr :: Class -> SDoc Source #
Data Class Source #
Instance details Defined in GHC.Core.Class Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Class -> c Class # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Class # toConstr :: Class -> Constr # dataTypeOf :: Class -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Class) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Class) # gmapT :: (forall b. Data b => b -> b) -> Class -> Class # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Class -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Class -> r # gmapQ :: (forall d. Data d => d -> u) -> Class -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Class -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Class -> m Class # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Class -> m Class # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Class -> m Class #
Eq Class Source #
Instance details Defined in GHC.Core.Class Methods (==) :: Class -> Class -> Bool # (/=) :: Class -> Class -> Bool #

type ClassOpItem = (Id, DefMethInfo) Source #

data ClassATItem Source #

Constructors

ATI TyCon (Maybe (Type, TyFamEqnValidityInfo))

Default associated type (if any) from this template.

As per Note [Associated type defaults], the Type has been renamed to use the class tyvars, while the TyFamEqnValidityInfo uses the original user-written type variables.

data TyFamEqnValidityInfo Source #

Information about a type family equation, used for validity checking of closed type family equations and associated type family default equations.

This type exists to delay validity-checking after typechecking type declaration groups, to avoid cyclic evaluation inside the typechecking knot.

See Note [Type-checking default assoc decls] in GHC.Tc.TyCl.

Constructors

NoVI	Used for equations which don't need any validity checking, for example equations imported from another module.
VI	Information necessary for validity checking of a type family equation.
Fields vi_loc :: SrcSpan vi_qtvs :: [TcTyVar] LHS quantified type variables vi_non_user_tvs :: TyVarSet non-user-written type variables (for error message reporting) Example: with -XPolyKinds, typechecking `type instance forall a. F = ()` introduces the kind variable `k` for the kind of `a`. See #23734. vi_pats :: [Type] LHS patterns vi_rhs :: Type RHS of the equation NB: for associated type family default declarations, this is the RHS before applying the substitution from Note [Type-checking default assoc decls] in GHC.Tc.TyCl.