| Safe Haskell | None |
|---|---|
| Language | Haskell2010 |
Hercules.API.Prelude
Contents
Description
Re-exports for the basic types that are used throughout the API
Re-exports
module Prelude
Types
Instances
A slug. Display names are simply Text.
Instances
64-bit signed integer type
Instances
A Map from keys k to values a.
The Semigroup operation for Map is union, which prefers
values from the left operand. If m1 maps a key k to a value
a1, and m2 maps the same key to a different value a2, then
their union m1 <> m2 maps k to a1.
Instances
| Eq2 Map | Since: containers-0.5.9 |
| Ord2 Map | Since: containers-0.5.9 |
Defined in Data.Map.Internal | |
| Show2 Map | Since: containers-0.5.9 |
| Functor (Map k) | |
| Foldable (Map k) | Folds in order of increasing key. |
Defined in Data.Map.Internal Methods fold :: Monoid m => Map k m -> m # foldMap :: Monoid m => (a -> m) -> Map k a -> m # foldMap' :: Monoid m => (a -> m) -> Map k a -> m # foldr :: (a -> b -> b) -> b -> Map k a -> b # foldr' :: (a -> b -> b) -> b -> Map k a -> b # foldl :: (b -> a -> b) -> b -> Map k a -> b # foldl' :: (b -> a -> b) -> b -> Map k a -> b # foldr1 :: (a -> a -> a) -> Map k a -> a # foldl1 :: (a -> a -> a) -> Map k a -> a # elem :: Eq a => a -> Map k a -> Bool # maximum :: Ord a => Map k a -> a # minimum :: Ord a => Map k a -> a # | |
| Traversable (Map k) | Traverses in order of increasing key. |
| ToJSONKey k => ToJSON1 (Map k) | |
Defined in Data.Aeson.Types.ToJSON Methods liftToJSON :: (a -> Value) -> ([a] -> Value) -> Map k a -> Value # liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Map k a] -> Value # liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Map k a -> Encoding # liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Map k a] -> Encoding # | |
| (FromJSONKey k, Ord k) => FromJSON1 (Map k) | |
| Eq k => Eq1 (Map k) | Since: containers-0.5.9 |
| Ord k => Ord1 (Map k) | Since: containers-0.5.9 |
Defined in Data.Map.Internal | |
| (Ord k, Read k) => Read1 (Map k) | Since: containers-0.5.9 |
Defined in Data.Map.Internal | |
| Show k => Show1 (Map k) | Since: containers-0.5.9 |
| Ord k => IsList (Map k v) | Since: containers-0.5.6.2 |
| (Eq k, Eq a) => Eq (Map k a) | |
| (Data k, Data a, Ord k) => Data (Map k a) | |
Defined in Data.Map.Internal Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Map k a -> c (Map k a) # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Map k a) # toConstr :: Map k a -> Constr # dataTypeOf :: Map k a -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (Map k a)) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Map k a)) # gmapT :: (forall b. Data b => b -> b) -> Map k a -> Map k a # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Map k a -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Map k a -> r # gmapQ :: (forall d. Data d => d -> u) -> Map k a -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Map k a -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Map k a -> m (Map k a) # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Map k a -> m (Map k a) # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Map k a -> m (Map k a) # | |
| (Ord k, Ord v) => Ord (Map k v) | |
| (Ord k, Read k, Read e) => Read (Map k e) | |
| (Show k, Show a) => Show (Map k a) | |
| Ord k => Semigroup (Map k v) | |
| Ord k => Monoid (Map k v) | |
| (ToJSON v, ToJSONKey k) => ToJSON (Map k v) | |
Defined in Data.Aeson.Types.ToJSON | |
| (FromJSONKey k, Ord k, FromJSON v) => FromJSON (Map k v) | |
| (NFData k, NFData a) => NFData (Map k a) | |
Defined in Data.Map.Internal | |
| Ord k => Ixed (Map k a) | |
Defined in Control.Lens.At | |
| Ord k => At (Map k a) | |
| Ord k => Wrapped (Map k a) | |
| Ord k => Ixed (Map k a) | |
| Ord k => At (Map k a) | |
| (ToJSONKey k, ToSchema k, ToSchema v) => ToSchema (Map k v) | |
Defined in Data.Swagger.Internal.Schema Methods declareNamedSchema :: Proxy (Map k v) -> Declare (Definitions Schema) NamedSchema # | |
| (t ~ Map k' a', Ord k) => Rewrapped (Map k a) t | Use |
Defined in Control.Lens.Wrapped | |
| type Item (Map k v) | |
Defined in Data.Map.Internal | |
| type Index (Map k a) | |
Defined in Control.Lens.At | |
| type IxValue (Map k a) | |
Defined in Control.Lens.At | |
| type Unwrapped (Map k a) | |
Defined in Control.Lens.Wrapped | |
| type Index (Map k a) | |
Defined in Optics.At.Core | |
| type IxValue (Map k a) | |
Defined in Optics.At.Core | |
| type IxKind (Map k a) | |
Defined in Optics.At.Core | |
A set of values a.
Instances
| Foldable Set | Folds in order of increasing key. |
Defined in Data.Set.Internal Methods fold :: Monoid m => Set m -> m # foldMap :: Monoid m => (a -> m) -> Set a -> m # foldMap' :: Monoid m => (a -> m) -> Set a -> m # foldr :: (a -> b -> b) -> b -> Set a -> b # foldr' :: (a -> b -> b) -> b -> Set a -> b # foldl :: (b -> a -> b) -> b -> Set a -> b # foldl' :: (b -> a -> b) -> b -> Set a -> b # foldr1 :: (a -> a -> a) -> Set a -> a # foldl1 :: (a -> a -> a) -> Set a -> a # elem :: Eq a => a -> Set a -> Bool # maximum :: Ord a => Set a -> a # | |
| ToJSON1 Set | |
Defined in Data.Aeson.Types.ToJSON Methods liftToJSON :: (a -> Value) -> ([a] -> Value) -> Set a -> Value # liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Set a] -> Value # liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Set a -> Encoding # liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Set a] -> Encoding # | |
| Eq1 Set | Since: containers-0.5.9 |
| Ord1 Set | Since: containers-0.5.9 |
Defined in Data.Set.Internal | |
| Show1 Set | Since: containers-0.5.9 |
| Ord a => IsList (Set a) | Since: containers-0.5.6.2 |
| Eq a => Eq (Set a) | |
| (Data a, Ord a) => Data (Set a) | |
Defined in Data.Set.Internal Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Set a -> c (Set a) # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Set a) # dataTypeOf :: Set a -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (Set a)) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Set a)) # gmapT :: (forall b. Data b => b -> b) -> Set a -> Set a # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Set a -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Set a -> r # gmapQ :: (forall d. Data d => d -> u) -> Set a -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Set a -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Set a -> m (Set a) # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Set a -> m (Set a) # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Set a -> m (Set a) # | |
| Ord a => Ord (Set a) | |
| (Read a, Ord a) => Read (Set a) | |
| Show a => Show (Set a) | |
| Ord a => Semigroup (Set a) | Since: containers-0.5.7 |
| Ord a => Monoid (Set a) | |
| ToJSON a => ToJSON (Set a) | |
Defined in Data.Aeson.Types.ToJSON | |
| (Ord a, FromJSON a) => FromJSON (Set a) | |
| NFData a => NFData (Set a) | |
Defined in Data.Set.Internal | |
| Ord a => Contains (Set a) | |
| Ord k => Ixed (Set k) | |
Defined in Control.Lens.At | |
| Ord k => At (Set k) | |
| Ord a => Wrapped (Set a) | |
| Ord a => Contains (Set a) | |
| Ord k => Ixed (Set k) | |
| Ord k => At (Set k) | |
| ToSchema a => ToSchema (Set a) | |
Defined in Data.Swagger.Internal.Schema Methods declareNamedSchema :: Proxy (Set a) -> Declare (Definitions Schema) NamedSchema # | |
| ToParamSchema a => ToParamSchema (Set a) | |
Defined in Data.Swagger.Internal.ParamSchema Methods toParamSchema :: forall (t :: SwaggerKind Type). Proxy (Set a) -> ParamSchema t # | |
| (t ~ Set a', Ord a) => Rewrapped (Set a) t | Use |
Defined in Control.Lens.Wrapped | |
| type Item (Set a) | |
Defined in Data.Set.Internal | |
| type Index (Set a) | |
Defined in Control.Lens.At | |
| type IxValue (Set k) | |
Defined in Control.Lens.At | |
| type Unwrapped (Set a) | |
Defined in Control.Lens.Wrapped | |
| type Index (Set a) | |
Defined in Optics.At.Core | |
| type IxValue (Set k) | |
Defined in Optics.At.Core | |
| type IxKind (Set k) | |
Defined in Optics.At.Core | |
A space efficient, packed, unboxed Unicode text type.
Instances
This is the simplest representation of UTC. It consists of the day number, and a time offset from midnight. Note that if a day has a leap second added to it, it will have 86401 seconds.
Instances
| Eq UTCTime | |
| Data UTCTime | |
Defined in Data.Time.Clock.Internal.UTCTime Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> UTCTime -> c UTCTime # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c UTCTime # toConstr :: UTCTime -> Constr # dataTypeOf :: UTCTime -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c UTCTime) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c UTCTime) # gmapT :: (forall b. Data b => b -> b) -> UTCTime -> UTCTime # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> UTCTime -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> UTCTime -> r # gmapQ :: (forall d. Data d => d -> u) -> UTCTime -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> UTCTime -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> UTCTime -> m UTCTime # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> UTCTime -> m UTCTime # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> UTCTime -> m UTCTime # | |
| Ord UTCTime | |
Defined in Data.Time.Clock.Internal.UTCTime | |
| ToJSON UTCTime | |
Defined in Data.Aeson.Types.ToJSON | |
| ToJSONKey UTCTime | |
Defined in Data.Aeson.Types.ToJSON | |
| FromJSON UTCTime | |
| FromJSONKey UTCTime | |
Defined in Data.Aeson.Types.FromJSON Methods | |
| NFData UTCTime | |
Defined in Data.Time.Clock.Internal.UTCTime | |
| ToHttpApiData UTCTime |
|
Defined in Web.Internal.HttpApiData Methods toUrlPiece :: UTCTime -> Text # toEncodedUrlPiece :: UTCTime -> Builder # toHeader :: UTCTime -> ByteString # toQueryParam :: UTCTime -> Text # | |
| FromHttpApiData UTCTime |
|
Defined in Web.Internal.HttpApiData Methods parseUrlPiece :: Text -> Either Text UTCTime # parseHeader :: ByteString -> Either Text UTCTime # | |
| ToSchema UTCTime |
|
Defined in Data.Swagger.Internal.Schema Methods declareNamedSchema :: Proxy UTCTime -> Declare (Definitions Schema) NamedSchema # | |
| ToParamSchema UTCTime |
|
Defined in Data.Swagger.Internal.ParamSchema Methods toParamSchema :: forall (t :: SwaggerKind Type). Proxy UTCTime -> ParamSchema t # | |
Type classes
Representable types of kind *.
This class is derivable in GHC with the DeriveGeneric flag on.
A Generic instance must satisfy the following laws:
from.to≡idto.from≡id
Instances
A class of types that can be fully evaluated.
Since: deepseq-1.1.0.0
Minimal complete definition
Nothing
Methods
rnf should reduce its argument to normal form (that is, fully
evaluate all sub-components), and then return ().
Generic NFData deriving
Starting with GHC 7.2, you can automatically derive instances
for types possessing a Generic instance.
Note: Generic1 can be auto-derived starting with GHC 7.4
{-# LANGUAGE DeriveGeneric #-}
import GHC.Generics (Generic, Generic1)
import Control.DeepSeq
data Foo a = Foo a String
deriving (Eq, Generic, Generic1)
instance NFData a => NFData (Foo a)
instance NFData1 Foo
data Colour = Red | Green | Blue
deriving Generic
instance NFData ColourStarting with GHC 7.10, the example above can be written more
concisely by enabling the new DeriveAnyClass extension:
{-# LANGUAGE DeriveGeneric, DeriveAnyClass #-}
import GHC.Generics (Generic)
import Control.DeepSeq
data Foo a = Foo a String
deriving (Eq, Generic, Generic1, NFData, NFData1)
data Colour = Red | Green | Blue
deriving (Generic, NFData)
Compatibility with previous deepseq versions
Prior to version 1.4.0.0, the default implementation of the rnf
method was defined as
rnfa =seqa ()
However, starting with deepseq-1.4.0.0, the default
implementation is based on DefaultSignatures allowing for
more accurate auto-derived NFData instances. If you need the
previously used exact default rnf method implementation
semantics, use
instance NFData Colour where rnf x = seq x ()
or alternatively
instance NFData Colour where rnf = rwhnf
or
{-# LANGUAGE BangPatterns #-}
instance NFData Colour where rnf !_ = ()Instances
| NFData Bool | |
Defined in Control.DeepSeq | |
| NFData Char | |
Defined in Control.DeepSeq | |
| NFData Double | |
Defined in Control.DeepSeq | |
| NFData Float | |
Defined in Control.DeepSeq | |
| NFData Int | |
Defined in Control.DeepSeq | |
| NFData Int8 | |
Defined in Control.DeepSeq | |
| NFData Int16 | |
Defined in Control.DeepSeq | |
| NFData Int32 | |
Defined in Control.DeepSeq | |
| NFData Int64 | |
Defined in Control.DeepSeq | |
| NFData Integer | |
Defined in Control.DeepSeq | |
| NFData Natural | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData Ordering | |
Defined in Control.DeepSeq | |
| NFData Word | |
Defined in Control.DeepSeq | |
| NFData Word8 | |
Defined in Control.DeepSeq | |
| NFData Word16 | |
Defined in Control.DeepSeq | |
| NFData Word32 | |
Defined in Control.DeepSeq | |
| NFData Word64 | |
Defined in Control.DeepSeq | |
| NFData CallStack | Since: deepseq-1.4.2.0 |
Defined in Control.DeepSeq | |
| NFData () | |
Defined in Control.DeepSeq | |
| NFData TyCon | NOTE: Prior to Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData Version | Since: deepseq-1.3.0.0 |
Defined in Control.DeepSeq | |
| NFData StdGen | |
Defined in System.Random.Internal | |
| NFData ByteString | |
Defined in Data.ByteString.Internal Methods rnf :: ByteString -> () # | |
| NFData Scientific | |
Defined in Data.Scientific Methods rnf :: Scientific -> () # | |
| NFData UTCTime | |
Defined in Data.Time.Clock.Internal.UTCTime | |
| NFData JSONPathElement | |
Defined in Data.Aeson.Types.Internal Methods rnf :: JSONPathElement -> () # | |
| NFData Value | |
Defined in Data.Aeson.Types.Internal | |
| NFData ThreadId | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData Void | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData Unique | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData ExitCode | Since: deepseq-1.4.2.0 |
Defined in Control.DeepSeq | |
| NFData MaskingState | Since: deepseq-1.4.4.0 |
Defined in Control.DeepSeq Methods rnf :: MaskingState -> () # | |
| NFData TypeRep | NOTE: Prior to Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData All | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData Any | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CChar | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CSChar | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CUChar | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CShort | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CUShort | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CInt | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CUInt | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CLong | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CULong | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CLLong | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CULLong | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CBool | Since: deepseq-1.4.3.0 |
Defined in Control.DeepSeq | |
| NFData CFloat | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CDouble | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CPtrdiff | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CSize | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CWchar | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CSigAtomic | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq Methods rnf :: CSigAtomic -> () # | |
| NFData CClock | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CTime | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CUSeconds | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CSUSeconds | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq Methods rnf :: CSUSeconds -> () # | |
| NFData CFile | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CFpos | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CJmpBuf | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CIntPtr | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CUIntPtr | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CIntMax | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData CUIntMax | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData Fingerprint | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq Methods rnf :: Fingerprint -> () # | |
| NFData SrcLoc | Since: deepseq-1.4.2.0 |
Defined in Control.DeepSeq | |
| NFData IntSet | |
Defined in Data.IntSet.Internal | |
| NFData SockAddr | |
Defined in Network.Socket.Types | |
| NFData URI | |
Defined in Network.URI | |
| NFData URIAuth | |
Defined in Network.URI | |
| NFData Doc | |
Defined in Text.PrettyPrint.HughesPJ | |
| NFData TextDetails | |
Defined in Text.PrettyPrint.Annotated.HughesPJ Methods rnf :: TextDetails -> () # | |
| NFData ByteArray | |
Defined in Data.Primitive.ByteArray | |
| NFData NoContent | |
Defined in Servant.API.ContentTypes | |
| NFData ZonedTime | |
Defined in Data.Time.LocalTime.Internal.ZonedTime | |
| NFData LocalTime | |
Defined in Data.Time.LocalTime.Internal.LocalTime | |
| NFData DiffTime | |
Defined in Data.Time.Clock.Internal.DiffTime | |
| NFData Day | |
Defined in Data.Time.Calendar.Days | |
| NFData UUID | |
Defined in Data.UUID.Types.Internal | |
| NFData a => NFData [a] | |
Defined in Control.DeepSeq | |
| NFData a => NFData (Maybe a) | |
Defined in Control.DeepSeq | |
| NFData a => NFData (Ratio a) | |
Defined in Control.DeepSeq | |
| NFData (Ptr a) | Since: deepseq-1.4.2.0 |
Defined in Control.DeepSeq | |
| NFData (FunPtr a) | Since: deepseq-1.4.2.0 |
Defined in Control.DeepSeq | |
| NFData a => NFData (IResult a) | |
Defined in Data.Aeson.Types.Internal | |
| NFData a => NFData (Result a) | |
Defined in Data.Aeson.Types.Internal | |
| NFData a => NFData (Complex a) | |
Defined in Control.DeepSeq | |
| NFData a => NFData (Min a) | Since: deepseq-1.4.2.0 |
Defined in Control.DeepSeq | |
| NFData a => NFData (Max a) | Since: deepseq-1.4.2.0 |
Defined in Control.DeepSeq | |
| NFData a => NFData (First a) | Since: deepseq-1.4.2.0 |
Defined in Control.DeepSeq | |
| NFData a => NFData (Last a) | Since: deepseq-1.4.2.0 |
Defined in Control.DeepSeq | |
| NFData m => NFData (WrappedMonoid m) | Since: deepseq-1.4.2.0 |
Defined in Control.DeepSeq Methods rnf :: WrappedMonoid m -> () # | |
| NFData a => NFData (Option a) | Since: deepseq-1.4.2.0 |
Defined in Control.DeepSeq | |
| NFData (StableName a) | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq Methods rnf :: StableName a -> () # | |
| NFData a => NFData (ZipList a) | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData a => NFData (Identity a) | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData (IORef a) | NOTE: Only strict in the reference and not the referenced value. Since: deepseq-1.4.2.0 |
Defined in Control.DeepSeq | |
| NFData a => NFData (First a) | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData a => NFData (Last a) | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData a => NFData (Dual a) | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData a => NFData (Sum a) | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData a => NFData (Product a) | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData a => NFData (Down a) | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData (MVar a) | NOTE: Only strict in the reference and not the referenced value. Since: deepseq-1.4.2.0 |
Defined in Control.DeepSeq | |
| NFData a => NFData (NonEmpty a) | Since: deepseq-1.4.2.0 |
Defined in Control.DeepSeq | |
| NFData a => NFData (IntMap a) | |
Defined in Data.IntMap.Internal | |
| NFData a => NFData (Tree a) | |
| NFData a => NFData (Seq a) | |
Defined in Data.Sequence.Internal | |
| NFData a => NFData (FingerTree a) | |
Defined in Data.Sequence.Internal Methods rnf :: FingerTree a -> () # | |
| NFData a => NFData (Digit a) | |
Defined in Data.Sequence.Internal | |
| NFData a => NFData (Node a) | |
Defined in Data.Sequence.Internal | |
| NFData a => NFData (Elem a) | |
Defined in Data.Sequence.Internal | |
| NFData a => NFData (Set a) | |
Defined in Data.Set.Internal | |
| NFData1 f => NFData (Fix f) | |
| NFData a => NFData (DNonEmpty a) | |
Defined in Data.DList.DNonEmpty.Internal | |
| NFData a => NFData (DList a) | |
Defined in Data.DList.Internal | |
| NFData a => NFData (I a) | Since: sop-core-0.2.5.0 |
Defined in Data.SOP.BasicFunctors | |
| NFData a => NFData (Hashed a) | |
Defined in Data.Hashable.Class | |
| NFData a => NFData (HashSet a) | |
Defined in Data.HashSet.Internal | |
| NFData (Vector a) | |
Defined in Data.Vector.Primitive | |
| NFData (Vector a) | |
Defined in Data.Vector.Storable | |
| NFData (Vector a) | |
Defined in Data.Vector.Unboxed.Base | |
| NFData a => NFData (Vector a) | |
Defined in Data.Vector | |
| NFData a => NFData (Doc a) | |
Defined in Text.PrettyPrint.Annotated.HughesPJ | |
| NFData a => NFData (AnnotDetails a) | |
Defined in Text.PrettyPrint.Annotated.HughesPJ Methods rnf :: AnnotDetails a -> () # | |
| NFData (PrimArray a) | |
Defined in Data.Primitive.PrimArray | |
| NFData (MutableByteArray s) | |
Defined in Data.Primitive.ByteArray Methods rnf :: MutableByteArray s -> () # | |
| NFData a => NFData (SmallArray a) | |
Defined in Data.Primitive.SmallArray Methods rnf :: SmallArray a -> () # | |
| NFData a => NFData (Array a) | |
Defined in Data.Primitive.Array | |
| NFData g => NFData (AtomicGen g) | |
Defined in System.Random.Stateful | |
| NFData g => NFData (IOGen g) | |
Defined in System.Random.Stateful | |
| NFData g => NFData (STGen g) | |
Defined in System.Random.Stateful | |
| NFData g => NFData (StateGen g) | |
Defined in System.Random.Internal | |
| NFDataHList xs => NFData (HList xs) | |
Defined in Servant.API.ResponseHeaders | |
| NFData a => NFData (Maybe a) | |
Defined in Data.Strict.Maybe | |
| NFData (a -> b) | This instance is for convenience and consistency with Since: deepseq-1.3.0.0 |
Defined in Control.DeepSeq | |
| (NFData a, NFData b) => NFData (Either a b) | |
Defined in Control.DeepSeq | |
| (NFData a, NFData b) => NFData (a, b) | |
Defined in Control.DeepSeq | |
| (NFData k, NFData v) => NFData (HashMap k v) | |
Defined in Data.HashMap.Internal | |
| (NFData k, NFData a) => NFData (Map k a) | |
Defined in Data.Map.Internal | |
| (NFData a, NFData b) => NFData (Array a b) | |
Defined in Control.DeepSeq | |
| (NFData i, NFData r) => NFData (IResult i r) | |
Defined in Data.Attoparsec.Internal.Types | |
| NFData (Fixed a) | Since: deepseq-1.3.0.0 |
Defined in Control.DeepSeq | |
| (NFData a, NFData b) => NFData (Arg a b) | Since: deepseq-1.4.2.0 |
Defined in Control.DeepSeq | |
| NFData (Proxy a) | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData (STRef s a) | NOTE: Only strict in the reference and not the referenced value. Since: deepseq-1.4.2.0 |
Defined in Control.DeepSeq | |
| NFData (MutablePrimArray s a) | |
Defined in Data.Primitive.PrimArray Methods rnf :: MutablePrimArray s a -> () # | |
| (NFDataHList ls, NFData a) => NFData (Headers ls a) | |
Defined in Servant.API.ResponseHeaders | |
| NFData a => NFData (ResponseHeader sym a) | |
Defined in Servant.API.ResponseHeaders Methods rnf :: ResponseHeader sym a -> () # | |
| (NFData a, NFData b) => NFData (Pair a b) | |
Defined in Data.Strict.Tuple | |
| (NFData a, NFData b) => NFData (These a b) | |
Defined in Data.Strict.These | |
| (NFData a, NFData b) => NFData (Either a b) | |
Defined in Data.Strict.Either | |
| (NFData a, NFData b) => NFData (These a b) | Since: these-0.7.1 |
Defined in Data.These | |
| (NFData k, NFData v) => NFData (Leaf k v) | |
Defined in Data.HashMap.Internal | |
| NFData (MVector s a) | |
Defined in Data.Vector.Unboxed.Base | |
| NFData (Id a) Source # | |
Defined in Hercules.API.Id | |
| NFData (Name a) Source # | |
Defined in Hercules.API.Name | |
| (NFData a1, NFData a2, NFData a3) => NFData (a1, a2, a3) | |
Defined in Control.DeepSeq | |
| NFData a => NFData (Const a b) | Since: deepseq-1.4.0.0 |
Defined in Control.DeepSeq | |
| NFData (a :~: b) | Since: deepseq-1.4.3.0 |
Defined in Control.DeepSeq | |
| NFData a => NFData (K a b) | Since: sop-core-0.2.5.0 |
Defined in Data.SOP.BasicFunctors | |
| NFData (NP (NP f) xss) => NFData (POP f xss) | Since: sop-core-0.2.5.0 |
Defined in Data.SOP.NP | |
| All (Compose NFData f) xs => NFData (NP f xs) | Since: sop-core-0.2.5.0 |
Defined in Data.SOP.NP | |
| NFData (NS (NP f) xss) => NFData (SOP f xss) | Since: sop-core-0.2.5.0 |
Defined in Data.SOP.NS | |
| All (Compose NFData f) xs => NFData (NS f xs) | Since: sop-core-0.2.5.0 |
Defined in Data.SOP.NS | |
| NFData b => NFData (Tagged s b) | |
Defined in Data.Tagged | |
| (NFData1 f, NFData1 g, NFData a) => NFData (These1 f g a) | This instance is available only with |
Defined in Data.Functor.These | |
| (NFData a1, NFData a2, NFData a3, NFData a4) => NFData (a1, a2, a3, a4) | |
Defined in Control.DeepSeq | |
| (NFData1 f, NFData1 g, NFData a) => NFData (Product f g a) | Since: deepseq-1.4.3.0 |
Defined in Control.DeepSeq | |
| (NFData1 f, NFData1 g, NFData a) => NFData (Sum f g a) | Since: deepseq-1.4.3.0 |
Defined in Control.DeepSeq | |
| NFData (a :~~: b) | Since: deepseq-1.4.3.0 |
Defined in Control.DeepSeq | |
| (NFData a1, NFData a2, NFData a3, NFData a4, NFData a5) => NFData (a1, a2, a3, a4, a5) | |
Defined in Control.DeepSeq | |
| (NFData1 f, NFData1 g, NFData a) => NFData (Compose f g a) | Since: deepseq-1.4.3.0 |
Defined in Control.DeepSeq | |
| NFData (f (g a)) => NFData ((f :.: g) a) | Since: sop-core-0.2.5.0 |
Defined in Data.SOP.BasicFunctors | |
| (NFData a1, NFData a2, NFData a3, NFData a4, NFData a5, NFData a6) => NFData (a1, a2, a3, a4, a5, a6) | |
Defined in Control.DeepSeq | |
| (NFData a1, NFData a2, NFData a3, NFData a4, NFData a5, NFData a6, NFData a7) => NFData (a1, a2, a3, a4, a5, a6, a7) | |
Defined in Control.DeepSeq | |
| (NFData a1, NFData a2, NFData a3, NFData a4, NFData a5, NFData a6, NFData a7, NFData a8) => NFData (a1, a2, a3, a4, a5, a6, a7, a8) | |
Defined in Control.DeepSeq | |
| (NFData a1, NFData a2, NFData a3, NFData a4, NFData a5, NFData a6, NFData a7, NFData a8, NFData a9) => NFData (a1, a2, a3, a4, a5, a6, a7, a8, a9) | |
Defined in Control.DeepSeq | |
A type that can be converted to JSON.
Instances in general must specify toJSON and should (but don't need
to) specify toEncoding.
An example type and instance:
-- Allow ourselves to writeTextliterals. {-# LANGUAGE OverloadedStrings #-} data Coord = Coord { x :: Double, y :: Double } instanceToJSONCoord wheretoJSON(Coord x y) =object["x".=x, "y".=y]toEncoding(Coord x y) =pairs("x".=x<>"y".=y)
Instead of manually writing your ToJSON instance, there are two options
to do it automatically:
- Data.Aeson.TH provides Template Haskell functions which will derive an instance at compile time. The generated instance is optimized for your type so it will probably be more efficient than the following option.
- The compiler can provide a default generic implementation for
toJSON.
To use the second, simply add a deriving clause to your
datatype and declare a GenericToJSON instance. If you require nothing other than
defaultOptions, it is sufficient to write (and this is the only
alternative where the default toJSON implementation is sufficient):
{-# LANGUAGE DeriveGeneric #-}
import GHC.Generics
data Coord = Coord { x :: Double, y :: Double } deriving Generic
instance ToJSON Coord where
toEncoding = genericToEncoding defaultOptions
If on the other hand you wish to customize the generic decoding, you have to implement both methods:
customOptions =defaultOptions{fieldLabelModifier=maptoUpper} instanceToJSONCoord wheretoJSON=genericToJSONcustomOptionstoEncoding=genericToEncodingcustomOptions
Previous versions of this library only had the toJSON method. Adding
toEncoding had two reasons:
- toEncoding is more efficient for the common case that the output of
toJSONis directly serialized to aByteString. Further, expressing either method in terms of the other would be non-optimal. - The choice of defaults allows a smooth transition for existing users:
Existing instances that do not define
toEncodingstill compile and have the correct semantics. This is ensured by making the default implementation oftoEncodingusetoJSON. This produces correct results, but since it performs an intermediate conversion to aValue, it will be less efficient than directly emitting anEncoding. (this also means that specifying nothing more thaninstance ToJSON Coordwould be sufficient as a generically decoding instance, but there probably exists no good reason to not specifytoEncodingin new instances.)
Instances
A type that can be converted from JSON, with the possibility of failure.
In many cases, you can get the compiler to generate parsing code for you (see below). To begin, let's cover writing an instance by hand.
There are various reasons a conversion could fail. For example, an
Object could be missing a required key, an Array could be of
the wrong size, or a value could be of an incompatible type.
The basic ways to signal a failed conversion are as follows:
failyields a custom error message: it is the recommended way of reporting a failure;empty(ormzero) is uninformative: use it when the error is meant to be caught by some(;<|>)typeMismatchcan be used to report a failure when the encountered value is not of the expected JSON type;unexpectedis an appropriate alternative when more than one type may be expected, or to keep the expected type implicit.
prependFailure (or modifyFailure) add more information to a parser's
error messages.
An example type and instance using typeMismatch and prependFailure:
-- Allow ourselves to writeTextliterals. {-# LANGUAGE OverloadedStrings #-} data Coord = Coord { x :: Double, y :: Double } instanceFromJSONCoord whereparseJSON(Objectv) = Coord<$>v.:"x"<*>v.:"y" -- We do not expect a non-Objectvalue here. -- We could useemptyto fail, buttypeMismatch-- gives a much more informative error message.parseJSONinvalid =prependFailure"parsing Coord failed, " (typeMismatch"Object" invalid)
For this common case of only being concerned with a single
type of JSON value, the functions withObject, withScientific, etc.
are provided. Their use is to be preferred when possible, since
they are more terse. Using withObject, we can rewrite the above instance
(assuming the same language extension and data type) as:
instanceFromJSONCoord whereparseJSON=withObject"Coord" $ \v -> Coord<$>v.:"x"<*>v.:"y"
Instead of manually writing your FromJSON instance, there are two options
to do it automatically:
- Data.Aeson.TH provides Template Haskell functions which will derive an instance at compile time. The generated instance is optimized for your type so it will probably be more efficient than the following option.
- The compiler can provide a default generic implementation for
parseJSON.
To use the second, simply add a deriving clause to your
datatype and declare a GenericFromJSON instance for your datatype without giving
a definition for parseJSON.
For example, the previous example can be simplified to just:
{-# LANGUAGE DeriveGeneric #-}
import GHC.Generics
data Coord = Coord { x :: Double, y :: Double } deriving Generic
instance FromJSON Coord
The default implementation will be equivalent to
parseJSON = ; if you need different
options, you can customize the generic decoding by defining:genericParseJSON defaultOptions
customOptions =defaultOptions{fieldLabelModifier=maptoUpper} instanceFromJSONCoord whereparseJSON=genericParseJSONcustomOptions
Instances
Convert a type into Schema
An example type and instance:
{-# LANGUAGE OverloadedStrings #-} -- allows to write Text literals
{-# LANGUAGE OverloadedLists #-} -- allows to write Map and HashMap as lists
import Control.Lens
import Data.Proxy
import Data.Swagger
data Coord = Coord { x :: Double, y :: Double }
instance ToSchema Coord where
declareNamedSchema _ = do
doubleSchema <- declareSchemaRef (Proxy :: Proxy Double)
return $ NamedSchema (Just "Coord") $ mempty
& type_ ?~ SwaggerObject
& properties .~
[ ("x", doubleSchema)
, ("y", doubleSchema)
]
& required .~ [ "x", "y" ]
Instead of manually writing your ToSchemadeclareNamedSchema
To do that, simply add deriving clause to your datatype
and declare a GenericToSchemadeclareNamedSchema
For instance, the previous example can be simplified into this:
{-# LANGUAGE DeriveGeneric #-}
import GHC.Generics (Generic)
data Coord = Coord { x :: Double, y :: Double } deriving Generic
instance ToSchema Coord