Copyright	(c) Fumiaki Kinoshita 2018
License	BSD3
Maintainer	Fumiaki Kinoshita <fumiexcel@gmail.com>
Safe Haskell	None
Language	Haskell2010

Data.Extensible.Field

Contents

Records and variants
Matching
Key / value
deprecated
Internal

Description

Flexible records and variants

Synopsis

newtype Field (h :: v -> Type) (kv :: Assoc k v) = Field {
- getField :: h (TargetOf kv)
}
(@=) :: Wrapper h => FieldName k -> Repr h v -> Field h (k :> v)
(<@=>) :: (Functor f, Wrapper h) => FieldName k -> f (Repr h v) -> Comp f (Field h) (k :> v)
(@:>) :: FieldName k -> h v -> Field h (k :> v)
(@==) :: FieldName (k :: Symbol) -> v -> Field Identity (k :> v)
type FieldOptic k = forall kind. forall f p t xs (h :: kind -> Type) (v :: kind). (Extensible f p t, ExtensibleConstr t xs (Field h) (k :> v), Lookup xs k v, Labelling k p, Wrapper h) => Optic' p f (t xs (Field h)) (Repr h v)
type FieldName k = Optic' (LabelPhantom k) Proxy (Inextensible '[k :> ()] (Field Proxy)) ()
liftField :: (g (TargetOf kv) -> h (TargetOf kv)) -> Field g kv -> Field h kv
liftField2 :: (f (TargetOf kv) -> g (TargetOf kv) -> h (TargetOf kv)) -> Field f kv -> Field g kv -> Field h kv
type RecordOf h xs = xs :& Field h
type Record xs = RecordOf Identity xs
emptyRecord :: Record '[]
type VariantOf h xs = xs :/ Field h
type Variant xs = VariantOf Identity xs
matchWithField :: (forall x. f x -> g x -> r) -> RecordOf f xs -> VariantOf g xs -> r
matchField :: RecordOf (Match h r) xs -> VariantOf h xs -> r
type family KeyOf (kv :: Assoc k v) :: k where ...
proxyKeyOf :: proxy kv -> Proxy (KeyOf kv)
stringKeyOf :: (IsString a, KnownSymbol (KeyOf kv)) => proxy kv -> a
type family TargetOf (kv :: Assoc k v) :: v where ...
proxyTargetOf :: proxy kv -> Proxy (TargetOf kv)
class pk (KeyOf kv) => KeyIs (pk :: k -> Constraint) (kv :: Assoc k v)
class pv (TargetOf kv) => TargetIs (pv :: k1 -> Constraint) (kv :: Assoc k k1)
class (pk (KeyOf kv), pv (TargetOf kv)) => KeyTargetAre (pk :: k -> Constraint) (pv :: k1 -> Constraint) (kv :: Assoc k k1)
type AssocKey kv = KeyOf kv
type AssocValue kv = TargetOf kv
type ValueIs = TargetIs
type KeyValue = KeyTargetAre
proxyAssocKey :: proxy kv -> Proxy (KeyOf kv)
stringAssocKey :: (IsString a, KnownSymbol (KeyOf kv)) => proxy kv -> a
proxyAssocValue :: proxy kv -> Proxy (TargetOf kv)
data LabelPhantom s a b
type family Labelling s p :: Constraint where ...
data Inextensible (xs :: [k]) (h :: k -> Type)

Documentation

newtype Field (h :: v -> Type) (kv :: Assoc k v) Source #

A Field h (k ':> v) is h v annotated with the field name k.

Field :: (v -> *) -> Assoc k v -> *

Constructors

Field
Fields getField :: h (TargetOf kv)

Instances

(Lookup xs k2 v2, Wrapper h, Repr h v2 ~ a) => HasField (k2 :: k1) (RecordOf h xs) a Source #
Instance details Defined in Data.Extensible.Label Methods getField :: RecordOf h xs -> a #
Unbox (h (TargetOf x)) => Vector Vector (Field h x) Source #
Instance details Defined in Data.Extensible.Field Methods basicUnsafeFreeze :: PrimMonad m => Mutable Vector (PrimState m) (Field h x) -> m (Vector (Field h x)) basicUnsafeThaw :: PrimMonad m => Vector (Field h x) -> m (Mutable Vector (PrimState m) (Field h x)) basicLength :: Vector (Field h x) -> Int basicUnsafeSlice :: Int -> Int -> Vector (Field h x) -> Vector (Field h x) basicUnsafeIndexM :: Monad m => Vector (Field h x) -> Int -> m (Field h x) basicUnsafeCopy :: PrimMonad m => Mutable Vector (PrimState m) (Field h x) -> Vector (Field h x) -> m () elemseq :: Vector (Field h x) -> Field h x -> b -> b
Unbox (h (TargetOf x)) => MVector MVector (Field h x) Source #
Instance details Defined in Data.Extensible.Field Methods basicLength :: MVector s (Field h x) -> Int basicUnsafeSlice :: Int -> Int -> MVector s (Field h x) -> MVector s (Field h x) basicOverlaps :: MVector s (Field h x) -> MVector s (Field h x) -> Bool basicUnsafeNew :: PrimMonad m => Int -> m (MVector (PrimState m) (Field h x)) basicInitialize :: PrimMonad m => MVector (PrimState m) (Field h x) -> m () basicUnsafeReplicate :: PrimMonad m => Int -> Field h x -> m (MVector (PrimState m) (Field h x)) basicUnsafeRead :: PrimMonad m => MVector (PrimState m) (Field h x) -> Int -> m (Field h x) basicUnsafeWrite :: PrimMonad m => MVector (PrimState m) (Field h x) -> Int -> Field h x -> m () basicClear :: PrimMonad m => MVector (PrimState m) (Field h x) -> m () basicSet :: PrimMonad m => MVector (PrimState m) (Field h x) -> Field h x -> m () basicUnsafeCopy :: PrimMonad m => MVector (PrimState m) (Field h x) -> MVector (PrimState m) (Field h x) -> m () basicUnsafeMove :: PrimMonad m => MVector (PrimState m) (Field h x) -> MVector (PrimState m) (Field h x) -> m () basicUnsafeGrow :: PrimMonad m => MVector (PrimState m) (Field h x) -> Int -> m (MVector (PrimState m) (Field h x))
(Bits r, FromBits r (h (TargetOf x))) => FromBits r (Field h x) Source #
Instance details Defined in Data.Extensible.Bits Associated Types type BitWidth (Field h x) :: Nat Source # Methods fromBits :: r -> Field h x Source # toBits :: Field h x -> r Source #
Wrapper h => Wrapper (Field h :: Assoc k v -> Type) Source #
Instance details Defined in Data.Extensible.Field Associated Types type Repr (Field h) v :: Type Source # Methods _Wrapper :: (Functor f, Profunctor p) => Optic' p f (Field h v0) (Repr (Field h) v0) Source # wrap :: Repr (Field h) v0 -> Field h v0 Source # unwrap :: Field h v0 -> Repr (Field h) v0 Source #
Forall (KeyTargetAre KnownSymbol (Instance1 FromJSON h)) xs => FromJSON (xs :& Nullable (Field h :: Assoc Symbol v -> Type))
Instance details Defined in Data.Extensible.Dictionary Methods parseJSON :: Value -> Parser (xs :& Nullable (Field h)) parseJSONList :: Value -> Parser [xs :& Nullable (Field h)]
Forall (KeyTargetAre KnownSymbol (Instance1 FromJSON h)) xs => FromJSON (xs :& (Field h :: Assoc Symbol v -> Type))	`parseJSON Null` is called for missing fields.
Instance details Defined in Data.Extensible.Dictionary Methods parseJSON :: Value -> Parser (xs :& Field h) parseJSONList :: Value -> Parser [xs :& Field h]
Forall (KeyTargetAre KnownSymbol (Instance1 ToJSON h)) xs => ToJSON (xs :& Nullable (Field h :: Assoc Symbol v -> Type))
Instance details Defined in Data.Extensible.Dictionary Methods toJSON :: (xs :& Nullable (Field h)) -> Value toEncoding :: (xs :& Nullable (Field h)) -> Encoding toJSONList :: [xs :& Nullable (Field h)] -> Value toEncodingList :: [xs :& Nullable (Field h)] -> Encoding
Forall (KeyTargetAre KnownSymbol (Instance1 ToJSON h)) xs => ToJSON (xs :& (Field h :: Assoc Symbol v -> Type))
Instance details Defined in Data.Extensible.Dictionary Methods toJSON :: (xs :& Field h) -> Value toEncoding :: (xs :& Field h) -> Encoding toJSONList :: [xs :& Field h] -> Value toEncodingList :: [xs :& Field h] -> Encoding
Forall (KeyTargetAre KnownSymbol (Instance1 FromField h)) xs => FromNamedRecord (xs :& (Field h :: Assoc Symbol v -> Type))
Instance details Defined in Data.Extensible.Dictionary Methods parseNamedRecord :: NamedRecord -> Parser (xs :& Field h)
Forall (KeyTargetAre KnownSymbol (Instance1 ToField h)) xs => ToNamedRecord (xs :& (Field h :: Assoc Symbol v -> Type))
Instance details Defined in Data.Extensible.Dictionary Methods toNamedRecord :: (xs :& Field h) -> NamedRecord
Bounded (h (TargetOf kv)) => Bounded (Field h kv) Source #
Instance details Defined in Data.Extensible.Field Methods minBound :: Field h kv # maxBound :: Field h kv #
Enum (h (TargetOf kv)) => Enum (Field h kv) Source #
Instance details Defined in Data.Extensible.Field Methods succ :: Field h kv -> Field h kv # pred :: Field h kv -> Field h kv # toEnum :: Int -> Field h kv # fromEnum :: Field h kv -> Int # enumFrom :: Field h kv -> [Field h kv] # enumFromThen :: Field h kv -> Field h kv -> [Field h kv] # enumFromTo :: Field h kv -> Field h kv -> [Field h kv] # enumFromThenTo :: Field h kv -> Field h kv -> Field h kv -> [Field h kv] #
Eq (h (TargetOf kv)) => Eq (Field h kv) Source #
Instance details Defined in Data.Extensible.Field Methods (==) :: Field h kv -> Field h kv -> Bool # (/=) :: Field h kv -> Field h kv -> Bool #
Floating (h (TargetOf kv)) => Floating (Field h kv) Source #
Instance details Defined in Data.Extensible.Field Methods pi :: Field h kv # exp :: Field h kv -> Field h kv # log :: Field h kv -> Field h kv # sqrt :: Field h kv -> Field h kv # (**) :: Field h kv -> Field h kv -> Field h kv # logBase :: Field h kv -> Field h kv -> Field h kv # sin :: Field h kv -> Field h kv # cos :: Field h kv -> Field h kv # tan :: Field h kv -> Field h kv # asin :: Field h kv -> Field h kv # acos :: Field h kv -> Field h kv # atan :: Field h kv -> Field h kv # sinh :: Field h kv -> Field h kv # cosh :: Field h kv -> Field h kv # tanh :: Field h kv -> Field h kv # asinh :: Field h kv -> Field h kv # acosh :: Field h kv -> Field h kv # atanh :: Field h kv -> Field h kv # log1p :: Field h kv -> Field h kv # expm1 :: Field h kv -> Field h kv # log1pexp :: Field h kv -> Field h kv # log1mexp :: Field h kv -> Field h kv #
Fractional (h (TargetOf kv)) => Fractional (Field h kv) Source #
Instance details Defined in Data.Extensible.Field Methods (/) :: Field h kv -> Field h kv -> Field h kv # recip :: Field h kv -> Field h kv # fromRational :: Rational -> Field h kv #
Integral (h (TargetOf kv)) => Integral (Field h kv) Source #
Instance details Defined in Data.Extensible.Field Methods quot :: Field h kv -> Field h kv -> Field h kv # rem :: Field h kv -> Field h kv -> Field h kv # div :: Field h kv -> Field h kv -> Field h kv # mod :: Field h kv -> Field h kv -> Field h kv # quotRem :: Field h kv -> Field h kv -> (Field h kv, Field h kv) # divMod :: Field h kv -> Field h kv -> (Field h kv, Field h kv) # toInteger :: Field h kv -> Integer #
Num (h (TargetOf kv)) => Num (Field h kv) Source #
Instance details Defined in Data.Extensible.Field Methods (+) :: Field h kv -> Field h kv -> Field h kv # (-) :: Field h kv -> Field h kv -> Field h kv # (*) :: Field h kv -> Field h kv -> Field h kv # negate :: Field h kv -> Field h kv # abs :: Field h kv -> Field h kv # signum :: Field h kv -> Field h kv # fromInteger :: Integer -> Field h kv #
Ord (h (TargetOf kv)) => Ord (Field h kv) Source #
Instance details Defined in Data.Extensible.Field Methods compare :: Field h kv -> Field h kv -> Ordering # (<) :: Field h kv -> Field h kv -> Bool # (<=) :: Field h kv -> Field h kv -> Bool # (>) :: Field h kv -> Field h kv -> Bool # (>=) :: Field h kv -> Field h kv -> Bool # max :: Field h kv -> Field h kv -> Field h kv # min :: Field h kv -> Field h kv -> Field h kv #
Real (h (TargetOf kv)) => Real (Field h kv) Source #
Instance details Defined in Data.Extensible.Field Methods toRational :: Field h kv -> Rational #
RealFloat (h (TargetOf kv)) => RealFloat (Field h kv) Source #
Instance details Defined in Data.Extensible.Field Methods floatRadix :: Field h kv -> Integer # floatDigits :: Field h kv -> Int # floatRange :: Field h kv -> (Int, Int) # decodeFloat :: Field h kv -> (Integer, Int) # encodeFloat :: Integer -> Int -> Field h kv # exponent :: Field h kv -> Int # significand :: Field h kv -> Field h kv # scaleFloat :: Int -> Field h kv -> Field h kv # isNaN :: Field h kv -> Bool # isInfinite :: Field h kv -> Bool # isDenormalized :: Field h kv -> Bool # isNegativeZero :: Field h kv -> Bool # isIEEE :: Field h kv -> Bool # atan2 :: Field h kv -> Field h kv -> Field h kv #
RealFrac (h (TargetOf kv)) => RealFrac (Field h kv) Source #
Instance details Defined in Data.Extensible.Field Methods properFraction :: Integral b => Field h kv -> (b, Field h kv) # truncate :: Integral b => Field h kv -> b # round :: Integral b => Field h kv -> b # ceiling :: Integral b => Field h kv -> b # floor :: Integral b => Field h kv -> b #
(KnownSymbol k, Wrapper h, Show (Repr h v2)) => Show (Field h (k :> v2)) Source #	Shows in `field @= value` style instead of the derived one.
Instance details Defined in Data.Extensible.Field Methods showsPrec :: Int -> Field h (k :> v2) -> ShowS # show :: Field h (k :> v2) -> String # showList :: [Field h (k :> v2)] -> ShowS #
Generic (Field h kv) Source #
Instance details Defined in Data.Extensible.Field Associated Types type Rep (Field h kv) :: Type -> Type # Methods from :: Field h kv -> Rep (Field h kv) x # to :: Rep (Field h kv) x -> Field h kv #
Semigroup (h (TargetOf kv)) => Semigroup (Field h kv) Source #
Instance details Defined in Data.Extensible.Field Methods (<>) :: Field h kv -> Field h kv -> Field h kv # sconcat :: NonEmpty (Field h kv) -> Field h kv # stimes :: Integral b => b -> Field h kv -> Field h kv #
Monoid (h (TargetOf kv)) => Monoid (Field h kv) Source #
Instance details Defined in Data.Extensible.Field Methods mempty :: Field h kv # mappend :: Field h kv -> Field h kv -> Field h kv # mconcat :: [Field h kv] -> Field h kv #
Lift (h (TargetOf x)) => Lift (Field h x) Source #
Instance details Defined in Data.Extensible.Field Methods lift :: Field h x -> Q Exp #
Storable (h (TargetOf kv)) => Storable (Field h kv) Source #
Instance details Defined in Data.Extensible.Field Methods sizeOf :: Field h kv -> Int # alignment :: Field h kv -> Int # peekElemOff :: Ptr (Field h kv) -> Int -> IO (Field h kv) # pokeElemOff :: Ptr (Field h kv) -> Int -> Field h kv -> IO () # peekByteOff :: Ptr b -> Int -> IO (Field h kv) # pokeByteOff :: Ptr b -> Int -> Field h kv -> IO () # peek :: Ptr (Field h kv) -> IO (Field h kv) # poke :: Ptr (Field h kv) -> Field h kv -> IO () #
NFData (h (TargetOf kv)) => NFData (Field h kv) Source #
Instance details Defined in Data.Extensible.Field Methods rnf :: Field h kv -> () #
Hashable (h (TargetOf kv)) => Hashable (Field h kv) Source #
Instance details Defined in Data.Extensible.Field Methods hashWithSalt :: Int -> Field h kv -> Int hash :: Field h kv -> Int
(KnownSymbol k, Pretty (h v2)) => Pretty (Field h (k :> v2)) Source #
Instance details Defined in Data.Extensible.Field Methods pretty :: Field h (k :> v2) -> Doc ann prettyList :: [Field h (k :> v2)] -> Doc ann
Arbitrary (h (TargetOf kv)) => Arbitrary (Field h kv) Source #
Instance details Defined in Data.Extensible.Field Methods arbitrary :: Gen (Field h kv) shrink :: Field h kv -> [Field h kv]
FromJSON (h (TargetOf kv)) => FromJSON (Field h kv) Source #
Instance details Defined in Data.Extensible.Field Methods parseJSON :: Value -> Parser (Field h kv) parseJSONList :: Value -> Parser [Field h kv]
ToJSON (h (TargetOf kv)) => ToJSON (Field h kv) Source #
Instance details Defined in Data.Extensible.Field Methods toJSON :: Field h kv -> Value toEncoding :: Field h kv -> Encoding toJSONList :: [Field h kv] -> Value toEncodingList :: [Field h kv] -> Encoding
FromField (h (TargetOf kv)) => FromField (Field h kv) Source #
Instance details Defined in Data.Extensible.Field Methods parseField :: Field0 -> Parser (Field h kv)
ToField (h (TargetOf kv)) => ToField (Field h kv) Source #
Instance details Defined in Data.Extensible.Field Methods toField :: Field h kv -> Field0
Unbox (h (TargetOf x)) => Unbox (Field h x) Source #
Instance details Defined in Data.Extensible.Field
newtype MVector s (Field h x) Source #
Instance details Defined in Data.Extensible.Field newtype MVector s (Field h x) = MV_Field (MVector s (h (TargetOf x)))
type Repr (Field h :: Assoc k v -> Type) (kv :: Assoc k v) Source #
Instance details Defined in Data.Extensible.Field type Repr (Field h :: Assoc k v -> Type) (kv :: Assoc k v) = Repr h (TargetOf kv)
type Rep (Field h kv) Source #
Instance details Defined in Data.Extensible.Field type Rep (Field h kv) = D1 (MetaData "Field" "Data.Extensible.Field" "extensible-0.7-inplace" True) (C1 (MetaCons "Field" PrefixI True) (S1 (MetaSel (Just "getField") NoSourceUnpackedness NoSourceStrictness DecidedLazy) (Rec0 (h (TargetOf kv)))))
newtype Vector (Field h x) Source #
Instance details Defined in Data.Extensible.Field newtype Vector (Field h x) = V_Field (Vector (h (TargetOf x)))
type BitWidth (Field h x) Source #
Instance details Defined in Data.Extensible.Bits type BitWidth (Field h x) = BitWidth (h (TargetOf x))

(@=) :: Wrapper h => FieldName k -> Repr h v -> Field h (k :> v) infix 1 Source #

Annotate a value by the field name.

foo :: Record '["num" >: Int, "str" >: String]
foo = #num @= 42
  <: #str @= "foo"
  <: nil

(<@=>) :: (Functor f, Wrapper h) => FieldName k -> f (Repr h v) -> Comp f (Field h) (k :> v) infix 1 Source #

Lifted (@=)

foo :: IO (Record '["num" >: Int, "str" >: String])
foo = hsequence
  $ #num <@=> readLn
  <: #str <@=> getLine
  <: nil

(@:>) :: FieldName k -> h v -> Field h (k :> v) infix 1 Source #

Annotate a value by the field name without Wrapper.

(@==) :: FieldName (k :: Symbol) -> v -> Field Identity (k :> v) infix 1 Source #

Kind-monomorphic, unwrapped version of @=

type FieldOptic k = forall kind. forall f p t xs (h :: kind -> Type) (v :: kind). (Extensible f p t, ExtensibleConstr t xs (Field h) (k :> v), Lookup xs k v, Labelling k p, Wrapper h) => Optic' p f (t xs (Field h)) (Repr h v) Source #

FieldOptic s is a type of optics that points a field/constructor named s.

The yielding fields can be Lenses for Records and Prisms for Variants.

FieldOptic "foo" = Lookup xs "foo" a => Lens' (Record xs) a
FieldOptic "foo" = Lookup xs "foo" a => Prism' (Variant xs) a

FieldOptics can be generated using mkField defined in the Data.Extensible.TH module.

type FieldName k = Optic' (LabelPhantom k) Proxy (Inextensible '[k :> ()] (Field Proxy)) () Source #

When you see this type as an argument, it expects a FieldLens. This type is used to resolve the name of the field internally.

liftField :: (g (TargetOf kv) -> h (TargetOf kv)) -> Field g kv -> Field h kv Source #

Lift a function for the content.

liftField2 :: (f (TargetOf kv) -> g (TargetOf kv) -> h (TargetOf kv)) -> Field f kv -> Field g kv -> Field h kv Source #

Lift a function for the content.

Records and variants

type RecordOf h xs = xs :& Field h Source #

The type of records which contain several fields.

RecordOf :: (v -> *) -> [Assoc k v] -> *

type Record xs = RecordOf Identity xs Source #

Simple record

emptyRecord :: Record '[] Source #

An empty Record.

type VariantOf h xs = xs :/ Field h Source #

The dual of RecordOf

VariantOf :: (v -> *) -> [Assoc k v] -> *

type Variant xs = VariantOf Identity xs Source #

Simple variant

Matching

matchWithField :: (forall x. f x -> g x -> r) -> RecordOf f xs -> VariantOf g xs -> r Source #

Select a corresponding field of a variant.

matchField :: RecordOf (Match h r) xs -> VariantOf h xs -> r Source #

Pattern matching on a Variant

Key / value

type family KeyOf (kv :: Assoc k v) :: k where ... #

Equations

KeyOf (k2 :> v2 :: Assoc k1 v1) = k2

proxyKeyOf :: proxy kv -> Proxy (KeyOf kv) #

stringKeyOf :: (IsString a, KnownSymbol (KeyOf kv)) => proxy kv -> a #

type family TargetOf (kv :: Assoc k v) :: v where ... #

Equations

TargetOf (k2 :> v2 :: Assoc k1 v1) = v2

proxyTargetOf :: proxy kv -> Proxy (TargetOf kv) #

class pk (KeyOf kv) => KeyIs (pk :: k -> Constraint) (kv :: Assoc k v) #

Instances

pk k2 => KeyIs (pk :: k1 -> Constraint) (k2 :> v2 :: Assoc k1 v1)
Instance details Defined in Type.Membership

class pv (TargetOf kv) => TargetIs (pv :: k1 -> Constraint) (kv :: Assoc k k1) #

Instances

pv v2 => TargetIs (pv :: v1 -> Constraint) (k2 :> v2 :: Assoc k1 v1)
Instance details Defined in Type.Membership

class (pk (KeyOf kv), pv (TargetOf kv)) => KeyTargetAre (pk :: k -> Constraint) (pv :: k1 -> Constraint) (kv :: Assoc k k1) #

Instances

(pk k2, pv v2) => KeyTargetAre (pk :: k1 -> Constraint) (pv :: v1 -> Constraint) (k2 :> v2 :: Assoc k1 v1)
Instance details Defined in Type.Membership

deprecated

type AssocKey kv = KeyOf kv Source #

Deprecated: Use KeyOf instead

type AssocValue kv = TargetOf kv Source #

Deprecated: Use TargetOf instead

type ValueIs = TargetIs Source #

Deprecated: Use TargetIs instead

type KeyValue = KeyTargetAre Source #

Deprecated: Use KeyTargetAre instead

proxyAssocKey :: proxy kv -> Proxy (KeyOf kv) Source #

Deprecated: Use proxyKeyOf instead

stringAssocKey :: (IsString a, KnownSymbol (KeyOf kv)) => proxy kv -> a Source #

Deprecated: Use stringKeyOf instead

proxyAssocValue :: proxy kv -> Proxy (TargetOf kv) Source #

Deprecated: Use proxyTargetOf instead

Internal

data LabelPhantom s a b Source #

A ghostly type which spells the field name

Instances

Profunctor (LabelPhantom s :: Type -> Type -> Type) Source #

Instance details

Defined in Data.Extensible.Field

Methods

dimap :: (a -> b) -> (c -> d) -> LabelPhantom s b c -> LabelPhantom s a d

lmap :: (a -> b) -> LabelPhantom s b c -> LabelPhantom s a c

rmap :: (b -> c) -> LabelPhantom s a b -> LabelPhantom s a c

(#.) :: Coercible c b => q b c -> LabelPhantom s a b -> LabelPhantom s a c

(.#) :: Coercible b a => LabelPhantom s b c -> q a b -> LabelPhantom s a c

type family Labelling s p :: Constraint where ... Source #

Signifies a field name internally

Equations

Labelling s (LabelPhantom t) = s ~ t
Labelling s p = ()

data Inextensible (xs :: [k]) (h :: k -> Type) Source #

The trivial inextensible data type

Instances

(Functor f, Profunctor p) => Extensible f p (Inextensible :: [k] -> (k -> Type) -> Type) Source #
Instance details Defined in Data.Extensible.Field Associated Types type ExtensibleConstr Inextensible xs h x :: Constraint Source # Methods pieceAt :: ExtensibleConstr Inextensible xs h x => Membership xs x -> Optic' p f (Inextensible xs h) (h x) Source #
type ExtensibleConstr (Inextensible :: [k] -> (k -> Type) -> Type) (xs :: [k]) (h :: k -> Type) (x :: k) Source #
Instance details Defined in Data.Extensible.Field type ExtensibleConstr (Inextensible :: [k] -> (k -> Type) -> Type) (xs :: [k]) (h :: k -> Type) (x :: k) = ()