Safe Haskell	None
Language	Haskell2010

Ouroboros.Network.Util.ShowProxy

Synopsis

class ShowProxy (p :: k) where
- showProxy :: Proxy p -> String
data Proxy (t :: k) = Proxy

Documentation

class ShowProxy (p :: k) where Source #

Minimal complete definition

Nothing

Methods

showProxy :: Proxy p -> String Source #

default showProxy :: forall. Typeable p => Proxy p -> String Source #

Instances

Instances details

ShowProxy SlotNo Source #
Instance details Defined in Ouroboros.Network.Util.ShowProxy Methods showProxy :: Proxy SlotNo -> String Source #
ShowProxy Int Source #
Instance details Defined in Ouroboros.Network.Util.ShowProxy Methods showProxy :: Proxy Int -> String Source #
ShowProxy block => ShowProxy (Point block :: Type) Source #
Instance details Defined in Ouroboros.Network.Block Methods showProxy :: Proxy (Point block) -> String Source #
ShowProxy a => ShowProxy (Serialised a :: Type) Source #
Instance details Defined in Ouroboros.Network.Block Methods showProxy :: Proxy (Serialised a) -> String Source #
ShowProxy b => ShowProxy (Tip b :: Type) Source #
Instance details Defined in Ouroboros.Network.Block Methods showProxy :: Proxy (Tip b) -> String Source #

data Proxy (t :: k) #

Proxy is a type that holds no data, but has a phantom parameter of arbitrary type (or even kind). Its use is to provide type information, even though there is no value available of that type (or it may be too costly to create one).

Historically, Proxy :: Proxy a is a safer alternative to the undefined :: a idiom.

>>> Proxy :: Proxy (Void, Int -> Int)
Proxy

Proxy can even hold types of higher kinds,

>>> Proxy :: Proxy Either
Proxy

>>> Proxy :: Proxy Functor
Proxy

>>> Proxy :: Proxy complicatedStructure
Proxy

Constructors

Proxy

Instances

Instances details

Generic1 (Proxy :: k -> Type)

Instance details

Defined in GHC.Internal.Generics

Associated Types

type Rep1 (Proxy :: k -> Type)	@since base-4.6.0.0
Instance details Defined in GHC.Internal.Generics type Rep1 (Proxy :: k -> Type) = D1 ('MetaData "Proxy" "GHC.Internal.Data.Proxy" "ghc-internal" 'False) (C1 ('MetaCons "Proxy" 'PrefixI 'False) (U1 :: k -> Type))

Methods

from1 :: forall (a :: k). Proxy a -> Rep1 (Proxy :: k -> Type) a #

to1 :: forall (a :: k). Rep1 (Proxy :: k -> Type) a -> Proxy a #

FromJSON1 (Proxy :: Type -> Type)

Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

liftParseJSON :: Maybe a -> (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser (Proxy a) #

liftParseJSONList :: Maybe a -> (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser [Proxy a] #

liftOmittedField :: Maybe a -> Maybe (Proxy a) #

ToJSON1 (Proxy :: Type -> Type)

Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Bool) -> (a -> Value) -> ([a] -> Value) -> Proxy a -> Value #

liftToJSONList :: (a -> Bool) -> (a -> Value) -> ([a] -> Value) -> [Proxy a] -> Value #

liftToEncoding :: (a -> Bool) -> (a -> Encoding) -> ([a] -> Encoding) -> Proxy a -> Encoding #

liftToEncodingList :: (a -> Bool) -> (a -> Encoding) -> ([a] -> Encoding) -> [Proxy a] -> Encoding #

liftOmitField :: (a -> Bool) -> Proxy a -> Bool #

MonadZip (Proxy :: Type -> Type)

Since: base-4.9.0.0

Instance details

Defined in Control.Monad.Zip

Methods

mzip :: Proxy a -> Proxy b -> Proxy (a, b) #

mzipWith :: (a -> b -> c) -> Proxy a -> Proxy b -> Proxy c #

munzip :: Proxy (a, b) -> (Proxy a, Proxy b) #

Eq1 (Proxy :: Type -> Type)

Since: base-4.9.0.0

Instance details

Defined in Data.Functor.Classes

Methods

liftEq :: (a -> b -> Bool) -> Proxy a -> Proxy b -> Bool #

Ord1 (Proxy :: Type -> Type)

Since: base-4.9.0.0

Instance details

Defined in Data.Functor.Classes

Methods

liftCompare :: (a -> b -> Ordering) -> Proxy a -> Proxy b -> Ordering #

Read1 (Proxy :: Type -> Type)

Since: base-4.9.0.0

Instance details

Defined in Data.Functor.Classes

Methods

liftReadsPrec :: (Int -> ReadS a) -> ReadS [a] -> Int -> ReadS (Proxy a) #

liftReadList :: (Int -> ReadS a) -> ReadS [a] -> ReadS [Proxy a] #

liftReadPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec (Proxy a) #

liftReadListPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec [Proxy a] #

Show1 (Proxy :: Type -> Type)

Since: base-4.9.0.0

Instance details

Defined in Data.Functor.Classes

Methods

liftShowsPrec :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> Int -> Proxy a -> ShowS #

liftShowList :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> [Proxy a] -> ShowS #

Contravariant (Proxy :: Type -> Type)

Instance details

Defined in Data.Functor.Contravariant

Methods

contramap :: (a' -> a) -> Proxy a -> Proxy a' #

(>$) :: b -> Proxy b -> Proxy a #

NFData1 (Proxy :: Type -> Type)

Since: deepseq-1.4.3.0

Instance details

Defined in Control.DeepSeq

Methods

liftRnf :: (a -> ()) -> Proxy a -> () #

Alternative (Proxy :: Type -> Type)

@since base-4.9.0.0

Instance details

Defined in GHC.Internal.Data.Proxy

Methods

empty :: Proxy a #

(<|>) :: Proxy a -> Proxy a -> Proxy a #

some :: Proxy a -> Proxy [a] #

many :: Proxy a -> Proxy [a] #

Applicative (Proxy :: Type -> Type)

@since base-4.7.0.0

Instance details

Defined in GHC.Internal.Data.Proxy

Methods

pure :: a -> Proxy a #

(<*>) :: Proxy (a -> b) -> Proxy a -> Proxy b #

liftA2 :: (a -> b -> c) -> Proxy a -> Proxy b -> Proxy c #

(*>) :: Proxy a -> Proxy b -> Proxy b #

(<*) :: Proxy a -> Proxy b -> Proxy a #

Functor (Proxy :: Type -> Type)

@since base-4.7.0.0

Instance details

Defined in GHC.Internal.Data.Proxy

Methods

fmap :: (a -> b) -> Proxy a -> Proxy b #

(<$) :: a -> Proxy b -> Proxy a #

Monad (Proxy :: Type -> Type)

@since base-4.7.0.0

Instance details

Defined in GHC.Internal.Data.Proxy

Methods

(>>=) :: Proxy a -> (a -> Proxy b) -> Proxy b #

(>>) :: Proxy a -> Proxy b -> Proxy b #

return :: a -> Proxy a #

MonadPlus (Proxy :: Type -> Type)

@since base-4.9.0.0

Instance details

Defined in GHC.Internal.Data.Proxy

Methods

mzero :: Proxy a #

mplus :: Proxy a -> Proxy a -> Proxy a #

Foldable (Proxy :: Type -> Type)

@since base-4.7.0.0

Instance details

Defined in GHC.Internal.Data.Foldable

Methods

fold :: Monoid m => Proxy m -> m #

foldMap :: Monoid m => (a -> m) -> Proxy a -> m #

foldMap' :: Monoid m => (a -> m) -> Proxy a -> m #

foldr :: (a -> b -> b) -> b -> Proxy a -> b #

foldr' :: (a -> b -> b) -> b -> Proxy a -> b #

foldl :: (b -> a -> b) -> b -> Proxy a -> b #

foldl' :: (b -> a -> b) -> b -> Proxy a -> b #

foldr1 :: (a -> a -> a) -> Proxy a -> a #

foldl1 :: (a -> a -> a) -> Proxy a -> a #

toList :: Proxy a -> [a] #

null :: Proxy a -> Bool #

length :: Proxy a -> Int #

elem :: Eq a => a -> Proxy a -> Bool #

maximum :: Ord a => Proxy a -> a #

minimum :: Ord a => Proxy a -> a #

sum :: Num a => Proxy a -> a #

product :: Num a => Proxy a -> a #

Traversable (Proxy :: Type -> Type)

@since base-4.7.0.0

Instance details

Defined in GHC.Internal.Data.Traversable

Methods

traverse :: Applicative f => (a -> f b) -> Proxy a -> f (Proxy b) #

sequenceA :: Applicative f => Proxy (f a) -> f (Proxy a) #

mapM :: Monad m => (a -> m b) -> Proxy a -> m (Proxy b) #

sequence :: Monad m => Proxy (m a) -> m (Proxy a) #

Hashable1 (Proxy :: Type -> Type)

Instance details

Defined in Data.Hashable.Class

Methods

liftHashWithSalt :: (Int -> a -> Int) -> Int -> Proxy a -> Int #

FromJSON (Proxy a)

Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser (Proxy a) #

parseJSONList :: Value -> Parser [Proxy a] #

omittedField :: Maybe (Proxy a) #

ToJSON (Proxy a)

Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: Proxy a -> Value #

toEncoding :: Proxy a -> Encoding #

toJSONList :: [Proxy a] -> Value #

toEncodingList :: [Proxy a] -> Encoding #

omitField :: Proxy a -> Bool #

NFData (Proxy a)

Since: deepseq-1.4.0.0

Instance details

Defined in Control.DeepSeq

Methods

rnf :: Proxy a -> () #

Monoid (Proxy s)

@since base-4.7.0.0

Instance details

Defined in GHC.Internal.Data.Proxy

Methods

mempty :: Proxy s #

mappend :: Proxy s -> Proxy s -> Proxy s #

mconcat :: [Proxy s] -> Proxy s #

Semigroup (Proxy s)

@since base-4.9.0.0

Instance details

Defined in GHC.Internal.Data.Proxy

Methods

(<>) :: Proxy s -> Proxy s -> Proxy s #

sconcat :: NonEmpty (Proxy s) -> Proxy s #

stimes :: Integral b => b -> Proxy s -> Proxy s #

Bounded (Proxy t)

@since base-4.7.0.0

Instance details

Defined in GHC.Internal.Data.Proxy

Methods

minBound :: Proxy t #

maxBound :: Proxy t #

Enum (Proxy s)

@since base-4.7.0.0

Instance details

Defined in GHC.Internal.Data.Proxy

Methods

succ :: Proxy s -> Proxy s #

pred :: Proxy s -> Proxy s #

toEnum :: Int -> Proxy s #

fromEnum :: Proxy s -> Int #

enumFrom :: Proxy s -> [Proxy s] #

enumFromThen :: Proxy s -> Proxy s -> [Proxy s] #

enumFromTo :: Proxy s -> Proxy s -> [Proxy s] #

enumFromThenTo :: Proxy s -> Proxy s -> Proxy s -> [Proxy s] #

Generic (Proxy t)

Instance details

Defined in GHC.Internal.Generics

Associated Types

type Rep (Proxy t)	@since base-4.6.0.0
Instance details Defined in GHC.Internal.Generics type Rep (Proxy t) = D1 ('MetaData "Proxy" "GHC.Internal.Data.Proxy" "ghc-internal" 'False) (C1 ('MetaCons "Proxy" 'PrefixI 'False) (U1 :: Type -> Type))

Methods

from :: Proxy t -> Rep (Proxy t) x #

to :: Rep (Proxy t) x -> Proxy t #

Ix (Proxy s)

@since base-4.7.0.0

Instance details

Defined in GHC.Internal.Data.Proxy

Methods

range :: (Proxy s, Proxy s) -> [Proxy s] #

index :: (Proxy s, Proxy s) -> Proxy s -> Int #

unsafeIndex :: (Proxy s, Proxy s) -> Proxy s -> Int #

inRange :: (Proxy s, Proxy s) -> Proxy s -> Bool #

rangeSize :: (Proxy s, Proxy s) -> Int #

unsafeRangeSize :: (Proxy s, Proxy s) -> Int #

Read (Proxy t)

@since base-4.7.0.0

Instance details

Defined in GHC.Internal.Data.Proxy

Methods

readsPrec :: Int -> ReadS (Proxy t) #

readList :: ReadS [Proxy t] #

readPrec :: ReadPrec (Proxy t) #

readListPrec :: ReadPrec [Proxy t] #

Show (Proxy s)

@since base-4.7.0.0

Instance details

Defined in GHC.Internal.Data.Proxy

Methods

showsPrec :: Int -> Proxy s -> ShowS #

show :: Proxy s -> String #

showList :: [Proxy s] -> ShowS #

Eq (Proxy s)

@since base-4.7.0.0

Instance details

Defined in GHC.Internal.Data.Proxy

Methods

(==) :: Proxy s -> Proxy s -> Bool #

(/=) :: Proxy s -> Proxy s -> Bool #

Ord (Proxy s)

@since base-4.7.0.0

Instance details

Defined in GHC.Internal.Data.Proxy

Methods

compare :: Proxy s -> Proxy s -> Ordering #

(<) :: Proxy s -> Proxy s -> Bool #

(<=) :: Proxy s -> Proxy s -> Bool #

(>) :: Proxy s -> Proxy s -> Bool #

(>=) :: Proxy s -> Proxy s -> Bool #

max :: Proxy s -> Proxy s -> Proxy s #

min :: Proxy s -> Proxy s -> Proxy s #

Hashable (Proxy a)

Instance details

Defined in Data.Hashable.Class

Methods

hashWithSalt :: Int -> Proxy a -> Int #

hash :: Proxy a -> Int #

Serialise (Proxy a)

Since: serialise-0.2.0.0

Instance details

Defined in Codec.Serialise.Class

Methods

encode :: Proxy a -> Encoding #

decode :: Decoder s (Proxy a) #

encodeList :: [Proxy a] -> Encoding #

decodeList :: Decoder s [Proxy a] #

type Rep1 (Proxy :: k -> Type)

@since base-4.6.0.0

Instance details

Defined in GHC.Internal.Generics

type Rep1 (Proxy :: k -> Type) = D1 ('MetaData "Proxy" "GHC.Internal.Data.Proxy" "ghc-internal" 'False) (C1 ('MetaCons "Proxy" 'PrefixI 'False) (U1 :: k -> Type))

type Rep (Proxy t)

@since base-4.6.0.0

Instance details

Defined in GHC.Internal.Generics

type Rep (Proxy t) = D1 ('MetaData "Proxy" "GHC.Internal.Data.Proxy" "ghc-internal" 'False) (C1 ('MetaCons "Proxy" 'PrefixI 'False) (U1 :: Type -> Type))