Safe Haskell	None
Language	Haskell2010

GHC.Types.FieldLabel

Synopsis

type FieldLabelString = FastString
type FieldLabelEnv = DFastStringEnv FieldLabel
data FieldLbl a = FieldLabel {
- flLabel :: FieldLabelString
- flIsOverloaded :: Bool
- flSelector :: a
}
type FieldLabel = FieldLbl Name
mkFieldLabelOccs :: FieldLabelString -> OccName -> Bool -> FieldLbl OccName

Documentation

type FieldLabelString = FastString Source #

Field labels are just represented as strings; they are not necessarily unique (even within a module)

type FieldLabelEnv = DFastStringEnv FieldLabel Source #

A map from labels to all the auxiliary information

data FieldLbl a Source #

Fields in an algebraic record type

Constructors

FieldLabel
Fields flLabel :: FieldLabelString User-visible label of the field flIsOverloaded :: Bool Was DuplicateRecordFields on in the defining module for this datatype? flSelector :: a Record selector function

Instances

Instances details

Functor FieldLbl #
Instance details Defined in GHC.Types.FieldLabel Methods fmap :: (a -> b) -> FieldLbl a -> FieldLbl b Source # (<$) :: a -> FieldLbl b -> FieldLbl a Source #
Foldable FieldLbl #
Instance details Defined in GHC.Types.FieldLabel Methods fold :: Monoid m => FieldLbl m -> m Source # foldMap :: Monoid m => (a -> m) -> FieldLbl a -> m Source # foldMap' :: Monoid m => (a -> m) -> FieldLbl a -> m Source # foldr :: (a -> b -> b) -> b -> FieldLbl a -> b Source # foldr' :: (a -> b -> b) -> b -> FieldLbl a -> b Source # foldl :: (b -> a -> b) -> b -> FieldLbl a -> b Source # foldl' :: (b -> a -> b) -> b -> FieldLbl a -> b Source # foldr1 :: (a -> a -> a) -> FieldLbl a -> a Source # foldl1 :: (a -> a -> a) -> FieldLbl a -> a Source # toList :: FieldLbl a -> [a] Source # null :: FieldLbl a -> Bool Source # length :: FieldLbl a -> Int Source # elem :: Eq a => a -> FieldLbl a -> Bool Source # maximum :: Ord a => FieldLbl a -> a Source # minimum :: Ord a => FieldLbl a -> a Source # sum :: Num a => FieldLbl a -> a Source # product :: Num a => FieldLbl a -> a Source #
Traversable FieldLbl #
Instance details Defined in GHC.Types.FieldLabel Methods traverse :: Applicative f => (a -> f b) -> FieldLbl a -> f (FieldLbl b) Source # sequenceA :: Applicative f => FieldLbl (f a) -> f (FieldLbl a) Source # mapM :: Monad m => (a -> m b) -> FieldLbl a -> m (FieldLbl b) Source # sequence :: Monad m => FieldLbl (m a) -> m (FieldLbl a) Source #
Eq a => Eq (FieldLbl a) #
Instance details Defined in GHC.Types.FieldLabel Methods (==) :: FieldLbl a -> FieldLbl a -> Bool # (/=) :: FieldLbl a -> FieldLbl a -> Bool #
Data a => Data (FieldLbl a) #
Instance details Defined in GHC.Types.FieldLabel Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> FieldLbl a -> c (FieldLbl a) Source # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (FieldLbl a) Source # toConstr :: FieldLbl a -> Constr Source # dataTypeOf :: FieldLbl a -> DataType Source # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (FieldLbl a)) Source # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (FieldLbl a)) Source # gmapT :: (forall b. Data b => b -> b) -> FieldLbl a -> FieldLbl a Source # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> FieldLbl a -> r Source # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> FieldLbl a -> r Source # gmapQ :: (forall d. Data d => d -> u) -> FieldLbl a -> [u] Source # gmapQi :: Int -> (forall d. Data d => d -> u) -> FieldLbl a -> u Source # gmapM :: Monad m => (forall d. Data d => d -> m d) -> FieldLbl a -> m (FieldLbl a) Source # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> FieldLbl a -> m (FieldLbl a) Source # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> FieldLbl a -> m (FieldLbl a) Source #
Outputable a => Outputable (FieldLbl a) #
Instance details Defined in GHC.Types.FieldLabel Methods ppr :: FieldLbl a -> SDoc Source # pprPrec :: Rational -> FieldLbl a -> SDoc Source #
Binary a => Binary (FieldLbl a) #
Instance details Defined in GHC.Types.FieldLabel Methods put_ :: BinHandle -> FieldLbl a -> IO () Source # put :: BinHandle -> FieldLbl a -> IO (Bin (FieldLbl a)) Source # get :: BinHandle -> IO (FieldLbl a) Source #

type FieldLabel = FieldLbl Name Source #

mkFieldLabelOccs :: FieldLabelString -> OccName -> Bool -> FieldLbl OccName Source #

Record selector OccNames are built from the underlying field name and the name of the first data constructor of the type, to support duplicate record field names. See Note [Why selector names include data constructors].