pantry-0.1.1.1: Content addressable Haskell package management

Safe HaskellNone
LanguageHaskell2010

Pantry.Internal.AesonExtended

Contents

Description

Extensions to Aeson parsing of objects. This module is intended for internal use by Pantry and Stack only. The intention is to fully remove this module in the future. DO NOT RELY ON IT.

Synopsis

Documentation

eitherDecodeFileStrict' :: FromJSON a => FilePath -> IO (Either String a) #

Like decodeFileStrict' but returns an error message when decoding fails.

eitherDecodeStrict' :: FromJSON a => ByteString -> Either String a #

Like decodeStrict' but returns an error message when decoding fails.

eitherDecode' :: FromJSON a => ByteString -> Either String a #

Like decode' but returns an error message when decoding fails.

eitherDecodeFileStrict :: FromJSON a => FilePath -> IO (Either String a) #

Like decodeFileStrict but returns an error message when decoding fails.

eitherDecodeStrict :: FromJSON a => ByteString -> Either String a #

Like decodeStrict but returns an error message when decoding fails.

eitherDecode :: FromJSON a => ByteString -> Either String a #

Like decode but returns an error message when decoding fails.

decodeFileStrict' :: FromJSON a => FilePath -> IO (Maybe a) #

Efficiently deserialize a JSON value from a file. If this fails due to incomplete or invalid input, Nothing is returned.

The input file's content must consist solely of a JSON document, with no trailing data except for whitespace.

This function parses and performs conversion immediately. See json' for details.

decodeStrict' :: FromJSON a => ByteString -> Maybe a #

Efficiently deserialize a JSON value from a strict ByteString. If this fails due to incomplete or invalid input, Nothing is returned.

The input must consist solely of a JSON document, with no trailing data except for whitespace.

This function parses and performs conversion immediately. See json' for details.

decode' :: FromJSON a => ByteString -> Maybe a #

Efficiently deserialize a JSON value from a lazy ByteString. If this fails due to incomplete or invalid input, Nothing is returned.

The input must consist solely of a JSON document, with no trailing data except for whitespace.

This function parses and performs conversion immediately. See json' for details.

decodeFileStrict :: FromJSON a => FilePath -> IO (Maybe a) #

Efficiently deserialize a JSON value from a file. If this fails due to incomplete or invalid input, Nothing is returned.

The input file's content must consist solely of a JSON document, with no trailing data except for whitespace.

This function parses immediately, but defers conversion. See json for details.

decodeStrict :: FromJSON a => ByteString -> Maybe a #

Efficiently deserialize a JSON value from a strict ByteString. If this fails due to incomplete or invalid input, Nothing is returned.

The input must consist solely of a JSON document, with no trailing data except for whitespace.

This function parses immediately, but defers conversion. See json for details.

decode :: FromJSON a => ByteString -> Maybe a #

Efficiently deserialize a JSON value from a lazy ByteString. If this fails due to incomplete or invalid input, Nothing is returned.

The input must consist solely of a JSON document, with no trailing data except for whitespace.

This function parses immediately, but defers conversion. See json for details.

encodeFile :: ToJSON a => FilePath -> a -> IO () #

Efficiently serialize a JSON value as a lazy ByteString and write it to a file.

encode :: ToJSON a => a -> ByteString #

Efficiently serialize a JSON value as a lazy ByteString.

This is implemented in terms of the ToJSON class's toEncoding method.

foldable :: (Foldable t, ToJSON a) => t a -> Encoding #

Encode a Foldable as a JSON array.

type GToJSON = GToJSON Value #

type GToEncoding = GToJSON Encoding #

toEncoding2 :: (ToJSON2 f, ToJSON a, ToJSON b) => f a b -> Encoding #

Lift the standard toEncoding function through the type constructor.

toJSON2 :: (ToJSON2 f, ToJSON a, ToJSON b) => f a b -> Value #

Lift the standard toJSON function through the type constructor.

toEncoding1 :: (ToJSON1 f, ToJSON a) => f a -> Encoding #

Lift the standard toEncoding function through the type constructor.

toJSON1 :: (ToJSON1 f, ToJSON a) => f a -> Value #

Lift the standard toJSON function through the type constructor.

genericLiftToEncoding :: (Generic1 f, GToJSON Encoding One (Rep1 f)) => Options -> (a -> Encoding) -> ([a] -> Encoding) -> f a -> Encoding #

A configurable generic JSON encoder. This function applied to defaultOptions is used as the default for liftToEncoding when the type is an instance of Generic1.

genericToEncoding :: (Generic a, GToJSON Encoding Zero (Rep a)) => Options -> a -> Encoding #

A configurable generic JSON encoder. This function applied to defaultOptions is used as the default for toEncoding when the type is an instance of Generic.

genericLiftToJSON :: (Generic1 f, GToJSON Value One (Rep1 f)) => Options -> (a -> Value) -> ([a] -> Value) -> f a -> Value #

A configurable generic JSON creator. This function applied to defaultOptions is used as the default for liftToJSON when the type is an instance of Generic1.

genericToJSON :: (Generic a, GToJSON Value Zero (Rep a)) => Options -> a -> Value #

A configurable generic JSON creator. This function applied to defaultOptions is used as the default for toJSON when the type is an instance of Generic.

data ToArgs res arity a where #

A ToArgs value either stores nothing (for ToJSON) or it stores the two function arguments that encode occurrences of the type parameter (for ToJSON1).

Constructors

NoToArgs :: forall res arity a. ToArgs res Zero a 
To1Args :: forall res arity a. (a -> res) -> ([a] -> res) -> ToArgs res One a 

class ToJSON a where #

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 write Text literals.
{-# LANGUAGE OverloadedStrings #-}

data Coord = Coord { x :: Double, y :: Double }

instance ToJSON Coord where
  toJSON (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 Generic clause to your datatype and declare a ToJSON 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 = map toUpper
                }

instance ToJSON Coord where
    toJSON     = genericToJSON customOptions
    toEncoding = genericToEncoding customOptions

Previous versions of this library only had the toJSON method. Adding toEncoding had two reasons:

  1. toEncoding is more efficient for the common case that the output of toJSON is directly serialized to a ByteString. Further, expressing either method in terms of the other would be non-optimal.
  2. The choice of defaults allows a smooth transition for existing users: Existing instances that do not define toEncoding still compile and have the correct semantics. This is ensured by making the default implementation of toEncoding use toJSON. This produces correct results, but since it performs an intermediate conversion to a Value, it will be less efficient than directly emitting an Encoding. (this also means that specifying nothing more than instance ToJSON Coord would be sufficient as a generically decoding instance, but there probably exists no good reason to not specify toEncoding in new instances.)

Minimal complete definition

Nothing

Methods

toJSON :: a -> Value #

Convert a Haskell value to a JSON-friendly intermediate type.

toEncoding :: a -> Encoding #

Encode a Haskell value as JSON.

The default implementation of this method creates an intermediate Value using toJSON. This provides source-level compatibility for people upgrading from older versions of this library, but obviously offers no performance advantage.

To benefit from direct encoding, you must provide an implementation for this method. The easiest way to do so is by having your types implement Generic using the DeriveGeneric extension, and then have GHC generate a method body as follows.

instance ToJSON Coord where
    toEncoding = genericToEncoding defaultOptions

toJSONList :: [a] -> Value #

toEncodingList :: [a] -> Encoding #

Instances
ToJSON Bool 
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Defined in Data.Aeson.Types.ToJSON

ToJSON Char 
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Defined in Data.Aeson.Types.ToJSON

ToJSON Double 
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Defined in Data.Aeson.Types.ToJSON

ToJSON Float 
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ToJSON Int 
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ToJSON Int8 
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Defined in Data.Aeson.Types.ToJSON

ToJSON Int16 
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ToJSON Int32 
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ToJSON Int64 
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Defined in Data.Aeson.Types.ToJSON

ToJSON Integer 
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Defined in Data.Aeson.Types.ToJSON

ToJSON Natural 
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Defined in Data.Aeson.Types.ToJSON

ToJSON Ordering 
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ToJSON Word 
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ToJSON Word8 
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ToJSON Word16 
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ToJSON Word32 
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ToJSON Word64 
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Defined in Data.Aeson.Types.ToJSON

ToJSON () 
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Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: () -> Value #

toEncoding :: () -> Encoding #

toJSONList :: [()] -> Value #

toEncodingList :: [()] -> Encoding #

ToJSON Version 
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Defined in Data.Aeson.Types.ToJSON

ToJSON Scientific 
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ToJSON Text 
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ToJSON UTCTime 
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ToJSON Value 
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ToJSON DotNetTime 
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ToJSON Text 
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ToJSON Number 
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ToJSON Void 
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Defined in Data.Aeson.Types.ToJSON

ToJSON CTime 
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ToJSON IntSet 
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Defined in Data.Aeson.Types.ToJSON

ToJSON DiffTime 
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Defined in Data.Aeson.Types.ToJSON

ToJSON PersistValue 
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Defined in Database.Persist.Types.Base

ToJSON Day 
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Defined in Data.Aeson.Types.ToJSON

ToJSON NominalDiffTime 
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Defined in Data.Aeson.Types.ToJSON

ToJSON TimeOfDay 
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Defined in Data.Aeson.Types.ToJSON

ToJSON LocalTime 
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Defined in Data.Aeson.Types.ToJSON

ToJSON ZonedTime 
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Defined in Data.Aeson.Types.ToJSON

ToJSON SystemTime

Encoded as number

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Defined in Data.Aeson.Types.ToJSON

ToJSON CalendarDiffTime 
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Defined in Data.Aeson.Types.ToJSON

ToJSON CalendarDiffDays 
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Defined in Data.Aeson.Types.ToJSON

ToJSON DayOfWeek 
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Defined in Data.Aeson.Types.ToJSON

ToJSON UUID 
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Defined in Data.Aeson.Types.ToJSON

ToJSON SHA256 Source # 
Instance details

Defined in Pantry.SHA256

ToJSON SnapshotLayer Source # 
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Defined in Pantry.Types

ToJSON RawSnapshotLayer Source # 
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Defined in Pantry.Types

ToJSON SnapshotLocation Source # 
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Defined in Pantry.Types

ToJSON RawSnapshotLocation Source # 
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Defined in Pantry.Types

ToJSON WantedCompiler Source # 
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Defined in Pantry.Types

ToJSON RelFilePath Source # 
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Defined in Pantry.Types

ToJSON TreeKey Source # 
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Defined in Pantry.Types

ToJSON PackageIdentifierRevision Source # 
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Defined in Pantry.Types

ToJSON VersionP Source # 
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Defined in Pantry.Types

ToJSON PackageNameP Source # 
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Defined in Pantry.Types

ToJSON BlobKey Source # 
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Defined in Pantry.Types

ToJSON FileSize Source # 
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Defined in Pantry.Types

ToJSON PackageLocationImmutable Source # 
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Defined in Pantry.Types

ToJSON RawPackageLocationImmutable Source # 
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Defined in Pantry.Types

ToJSON RawPackageLocation Source # 
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Defined in Pantry.Types

ToJSON a => ToJSON [a] 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: [a] -> Value #

toEncoding :: [a] -> Encoding #

toJSONList :: [[a]] -> Value #

toEncodingList :: [[a]] -> Encoding #

ToJSON a => ToJSON (Maybe a) 
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Defined in Data.Aeson.Types.ToJSON

(ToJSON a, Integral a) => ToJSON (Ratio a) 
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ToJSON a => ToJSON (Last a) 
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Defined in Data.Aeson.Types.ToJSON

HasResolution a => ToJSON (Fixed a) 
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ToJSON a => ToJSON (Min a) 
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Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: Min a -> Value #

toEncoding :: Min a -> Encoding #

toJSONList :: [Min a] -> Value #

toEncodingList :: [Min a] -> Encoding #

ToJSON a => ToJSON (Max a) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: Max a -> Value #

toEncoding :: Max a -> Encoding #

toJSONList :: [Max a] -> Value #

toEncodingList :: [Max a] -> Encoding #

ToJSON a => ToJSON (First a) 
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Defined in Data.Aeson.Types.ToJSON

ToJSON a => ToJSON (WrappedMonoid a) 
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Defined in Data.Aeson.Types.ToJSON

ToJSON a => ToJSON (Option a) 
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ToJSON a => ToJSON (Identity a) 
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ToJSON a => ToJSON (First a) 
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ToJSON a => ToJSON (Last a) 
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ToJSON a => ToJSON (Dual a) 
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Defined in Data.Aeson.Types.ToJSON

ToJSON a => ToJSON (NonEmpty a) 
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Defined in Data.Aeson.Types.ToJSON

ToJSON a => ToJSON (IntMap a) 
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Defined in Data.Aeson.Types.ToJSON

ToJSON v => ToJSON (Tree v) 
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Defined in Data.Aeson.Types.ToJSON

ToJSON a => ToJSON (Seq a) 
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Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: Seq a -> Value #

toEncoding :: Seq a -> Encoding #

toJSONList :: [Seq a] -> Value #

toEncodingList :: [Seq a] -> Encoding #

ToJSON a => ToJSON (Set a) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: Set a -> Value #

toEncoding :: Set a -> Encoding #

toJSONList :: [Set a] -> Value #

toEncodingList :: [Set a] -> Encoding #

ToJSON a => ToJSON (DList a) 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSON (Key TreeEntry) Source # 
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Defined in Pantry.Storage

ToJSON (Key Tree) Source # 
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Defined in Pantry.Storage

ToJSON (Key Version) Source # 
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Defined in Pantry.Storage

ToJSON (Key PackageName) Source # 
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Defined in Pantry.Storage

(Prim a, ToJSON a) => ToJSON (PrimArray a) 
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Defined in Data.Aeson.Types.ToJSON

ToJSON a => ToJSON (SmallArray a) 
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Defined in Data.Aeson.Types.ToJSON

ToJSON a => ToJSON (Array a) 
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Defined in Data.Aeson.Types.ToJSON

ToJSON a => ToJSON (Vector a) 
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Defined in Data.Aeson.Types.ToJSON

(Storable a, ToJSON a) => ToJSON (Vector a) 
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Defined in Data.Aeson.Types.ToJSON

(Vector Vector a, ToJSON a) => ToJSON (Vector a) 
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Defined in Data.Aeson.Types.ToJSON

ToJSON a => ToJSON (HashSet a) 
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Defined in Data.Aeson.Types.ToJSON

(Prim a, ToJSON a) => ToJSON (Vector a) 
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Defined in Data.Aeson.Types.ToJSON

Text a => ToJSON (CabalString a) Source # 
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Defined in Pantry.Types

(ToJSON a, ToJSON b) => ToJSON (Either a b) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: Either a b -> Value #

toEncoding :: Either a b -> Encoding #

toJSONList :: [Either a b] -> Value #

toEncodingList :: [Either a b] -> Encoding #

(ToJSON a, ToJSON b) => ToJSON (a, b) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: (a, b) -> Value #

toEncoding :: (a, b) -> Encoding #

toJSONList :: [(a, b)] -> Value #

toEncodingList :: [(a, b)] -> Encoding #

(ToJSON v, ToJSONKey k) => ToJSON (Map k v) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: Map k v -> Value #

toEncoding :: Map k v -> Encoding #

toJSONList :: [Map k v] -> Value #

toEncodingList :: [Map k v] -> Encoding #

(ToJSON v, ToJSONKey k) => ToJSON (HashMap k v) 
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Defined in Data.Aeson.Types.ToJSON

ToJSON (Proxy a) 
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Defined in Data.Aeson.Types.ToJSON

ToJSON (Path b t) 
Instance details

Defined in Path.Internal

Methods

toJSON :: Path b t -> Value #

toEncoding :: Path b t -> Encoding #

toJSONList :: [Path b t] -> Value #

toEncodingList :: [Path b t] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c) => ToJSON (a, b, c) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: (a, b, c) -> Value #

toEncoding :: (a, b, c) -> Encoding #

toJSONList :: [(a, b, c)] -> Value #

toEncodingList :: [(a, b, c)] -> Encoding #

ToJSON a => ToJSON (Const a b) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: Const a b -> Value #

toEncoding :: Const a b -> Encoding #

toJSONList :: [Const a b] -> Value #

toEncodingList :: [Const a b] -> Encoding #

ToJSON b => ToJSON (Tagged a b) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: Tagged a b -> Value #

toEncoding :: Tagged a b -> Encoding #

toJSONList :: [Tagged a b] -> Value #

toEncodingList :: [Tagged a b] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d) => ToJSON (a, b, c, d) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: (a, b, c, d) -> Value #

toEncoding :: (a, b, c, d) -> Encoding #

toJSONList :: [(a, b, c, d)] -> Value #

toEncodingList :: [(a, b, c, d)] -> Encoding #

(ToJSON1 f, ToJSON1 g, ToJSON a) => ToJSON (Product f g a) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: Product f g a -> Value #

toEncoding :: Product f g a -> Encoding #

toJSONList :: [Product f g a] -> Value #

toEncodingList :: [Product f g a] -> Encoding #

(ToJSON1 f, ToJSON1 g, ToJSON a) => ToJSON (Sum f g a) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: Sum f g a -> Value #

toEncoding :: Sum f g a -> Encoding #

toJSONList :: [Sum f g a] -> Value #

toEncodingList :: [Sum f g a] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e) => ToJSON (a, b, c, d, e) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: (a, b, c, d, e) -> Value #

toEncoding :: (a, b, c, d, e) -> Encoding #

toJSONList :: [(a, b, c, d, e)] -> Value #

toEncodingList :: [(a, b, c, d, e)] -> Encoding #

(ToJSON1 f, ToJSON1 g, ToJSON a) => ToJSON (Compose f g a) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: Compose f g a -> Value #

toEncoding :: Compose f g a -> Encoding #

toJSONList :: [Compose f g a] -> Value #

toEncodingList :: [Compose f g a] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f) => ToJSON (a, b, c, d, e, f) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: (a, b, c, d, e, f) -> Value #

toEncoding :: (a, b, c, d, e, f) -> Encoding #

toJSONList :: [(a, b, c, d, e, f)] -> Value #

toEncodingList :: [(a, b, c, d, e, f)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g) => ToJSON (a, b, c, d, e, f, g) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: (a, b, c, d, e, f, g) -> Value #

toEncoding :: (a, b, c, d, e, f, g) -> Encoding #

toJSONList :: [(a, b, c, d, e, f, g)] -> Value #

toEncodingList :: [(a, b, c, d, e, f, g)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g, ToJSON h) => ToJSON (a, b, c, d, e, f, g, h) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: (a, b, c, d, e, f, g, h) -> Value #

toEncoding :: (a, b, c, d, e, f, g, h) -> Encoding #

toJSONList :: [(a, b, c, d, e, f, g, h)] -> Value #

toEncodingList :: [(a, b, c, d, e, f, g, h)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g, ToJSON h, ToJSON i) => ToJSON (a, b, c, d, e, f, g, h, i) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: (a, b, c, d, e, f, g, h, i) -> Value #

toEncoding :: (a, b, c, d, e, f, g, h, i) -> Encoding #

toJSONList :: [(a, b, c, d, e, f, g, h, i)] -> Value #

toEncodingList :: [(a, b, c, d, e, f, g, h, i)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g, ToJSON h, ToJSON i, ToJSON j) => ToJSON (a, b, c, d, e, f, g, h, i, j) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: (a, b, c, d, e, f, g, h, i, j) -> Value #

toEncoding :: (a, b, c, d, e, f, g, h, i, j) -> Encoding #

toJSONList :: [(a, b, c, d, e, f, g, h, i, j)] -> Value #

toEncodingList :: [(a, b, c, d, e, f, g, h, i, j)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g, ToJSON h, ToJSON i, ToJSON j, ToJSON k) => ToJSON (a, b, c, d, e, f, g, h, i, j, k) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: (a, b, c, d, e, f, g, h, i, j, k) -> Value #

toEncoding :: (a, b, c, d, e, f, g, h, i, j, k) -> Encoding #

toJSONList :: [(a, b, c, d, e, f, g, h, i, j, k)] -> Value #

toEncodingList :: [(a, b, c, d, e, f, g, h, i, j, k)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g, ToJSON h, ToJSON i, ToJSON j, ToJSON k, ToJSON l) => ToJSON (a, b, c, d, e, f, g, h, i, j, k, l) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: (a, b, c, d, e, f, g, h, i, j, k, l) -> Value #

toEncoding :: (a, b, c, d, e, f, g, h, i, j, k, l) -> Encoding #

toJSONList :: [(a, b, c, d, e, f, g, h, i, j, k, l)] -> Value #

toEncodingList :: [(a, b, c, d, e, f, g, h, i, j, k, l)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g, ToJSON h, ToJSON i, ToJSON j, ToJSON k, ToJSON l, ToJSON m) => ToJSON (a, b, c, d, e, f, g, h, i, j, k, l, m) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: (a, b, c, d, e, f, g, h, i, j, k, l, m) -> Value #

toEncoding :: (a, b, c, d, e, f, g, h, i, j, k, l, m) -> Encoding #

toJSONList :: [(a, b, c, d, e, f, g, h, i, j, k, l, m)] -> Value #

toEncodingList :: [(a, b, c, d, e, f, g, h, i, j, k, l, m)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g, ToJSON h, ToJSON i, ToJSON j, ToJSON k, ToJSON l, ToJSON m, ToJSON n) => ToJSON (a, b, c, d, e, f, g, h, i, j, k, l, m, n) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: (a, b, c, d, e, f, g, h, i, j, k, l, m, n) -> Value #

toEncoding :: (a, b, c, d, e, f, g, h, i, j, k, l, m, n) -> Encoding #

toJSONList :: [(a, b, c, d, e, f, g, h, i, j, k, l, m, n)] -> Value #

toEncodingList :: [(a, b, c, d, e, f, g, h, i, j, k, l, m, n)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g, ToJSON h, ToJSON i, ToJSON j, ToJSON k, ToJSON l, ToJSON m, ToJSON n, ToJSON o) => ToJSON (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSON :: (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o) -> Value #

toEncoding :: (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o) -> Encoding #

toJSONList :: [(a, b, c, d, e, f, g, h, i, j, k, l, m, n, o)] -> Value #

toEncodingList :: [(a, b, c, d, e, f, g, h, i, j, k, l, m, n, o)] -> Encoding #

class KeyValue kv where #

A key-value pair for encoding a JSON object.

Methods

(.=) :: ToJSON v => Text -> v -> kv infixr 8 #

Instances
KeyValue Series 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

(.=) :: ToJSON v => Text -> v -> Series #

KeyValue Object

Constructs a singleton HashMap. For calling functions that demand an Object for constructing objects. To be used in conjunction with mconcat. Prefer to use object where possible.

Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

(.=) :: ToJSON v => Text -> v -> Object #

KeyValue Pair 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

(.=) :: ToJSON v => Text -> v -> Pair #

class ToJSONKey a where #

Typeclass for types that can be used as the key of a map-like container (like Map or HashMap). For example, since Text has a ToJSONKey instance and Char has a ToJSON instance, we can encode a value of type Map Text Char:

>>> LBC8.putStrLn $ encode $ Map.fromList [("foo" :: Text, 'a')]
{"foo":"a"}

Since Int also has a ToJSONKey instance, we can similarly write:

>>> LBC8.putStrLn $ encode $ Map.fromList [(5 :: Int, 'a')]
{"5":"a"}

JSON documents only accept strings as object keys. For any type from base that has a natural textual representation, it can be expected that its ToJSONKey instance will choose that representation.

For data types that lack a natural textual representation, an alternative is provided. The map-like container is represented as a JSON array instead of a JSON object. Each value in the array is an array with exactly two values. The first is the key and the second is the value.

For example, values of type '[Text]' cannot be encoded to a string, so a Map with keys of type '[Text]' is encoded as follows:

>>> LBC8.putStrLn $ encode $ Map.fromList [(["foo","bar","baz" :: Text], 'a')]
[[["foo","bar","baz"],"a"]]

The default implementation of ToJSONKey chooses this method of encoding a key, using the ToJSON instance of the type.

To use your own data type as the key in a map, all that is needed is to write a ToJSONKey (and possibly a FromJSONKey) instance for it. If the type cannot be trivially converted to and from Text, it is recommended that ToJSONKeyValue is used. Since the default implementations of the typeclass methods can build this from a ToJSON instance, there is nothing that needs to be written:

data Foo = Foo { fooAge :: Int, fooName :: Text }
  deriving (Eq,Ord,Generic)
instance ToJSON Foo
instance ToJSONKey Foo

That's it. We can now write:

>>> let m = Map.fromList [(Foo 4 "bar",'a'),(Foo 6 "arg",'b')]
>>> LBC8.putStrLn $ encode m
[[{"fooName":"bar","fooAge":4},"a"],[{"fooName":"arg","fooAge":6},"b"]]

The next case to consider is if we have a type that is a newtype wrapper around Text. The recommended approach is to use generalized newtype deriving:

newtype RecordId = RecordId { getRecordId :: Text }
  deriving (Eq,Ord,ToJSONKey)

Then we may write:

>>> LBC8.putStrLn $ encode $ Map.fromList [(RecordId "abc",'a')]
{"abc":"a"}

Simple sum types are a final case worth considering. Suppose we have:

data Color = Red | Green | Blue
  deriving (Show,Read,Eq,Ord)

It is possible to get the ToJSONKey instance for free as we did with Foo. However, in this case, we have a natural way to go to and from Text that does not require any escape sequences. So ToJSONKeyText can be used instead of ToJSONKeyValue to encode maps as objects instead of arrays of pairs. This instance may be implemented using generics as follows:

instance ToJSONKey Color where
  toJSONKey = genericToJSONKey defaultJSONKeyOptions

Low-level implementations

Expand

The Show instance can be used to help write ToJSONKey:

instance ToJSONKey Color where
  toJSONKey = ToJSONKeyText f g
    where f = Text.pack . show
          g = text . Text.pack . show
          -- text function is from Data.Aeson.Encoding

The situation of needing to turning function a -> Text into a ToJSONKeyFunction is common enough that a special combinator is provided for it. The above instance can be rewritten as:

instance ToJSONKey Color where
  toJSONKey = toJSONKeyText (Text.pack . show)

The performance of the above instance can be improved by not using Value as an intermediate step when converting to Text. One option for improving performance would be to use template haskell machinery from the text-show package. However, even with the approach, the Encoding (a wrapper around a bytestring builder) is generated by encoding the Text to a ByteString, an intermediate step that could be avoided. The fastest possible implementation would be:

-- Assuming that OverloadedStrings is enabled
instance ToJSONKey Color where
  toJSONKey = ToJSONKeyText f g
    where f x = case x of {Red -> "Red";Green ->"Green";Blue -> "Blue"}
          g x = case x of {Red -> text "Red";Green -> text "Green";Blue -> text "Blue"}
          -- text function is from Data.Aeson.Encoding

This works because GHC can lift the encoded values out of the case statements, which means that they are only evaluated once. This approach should only be used when there is a serious need to maximize performance.

Minimal complete definition

Nothing

Methods

toJSONKey :: ToJSONKeyFunction a #

Strategy for rendering the key for a map-like container.

toJSONKeyList :: ToJSONKeyFunction [a] #

This is similar in spirit to the showsList method of Show. It makes it possible to give Value keys special treatment without using OverlappingInstances. End users should always be able to use the default implementation of this method.

Instances
ToJSONKey Bool 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey Char 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey Double 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey Float 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey Int 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey Int8 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey Int16 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey Int32 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey Int64 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey Integer 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey Natural 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey Word 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey Word8 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey Word16 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey Word32 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey Word64 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey Version 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey Scientific 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey Text 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey UTCTime 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey Text 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey Day 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey TimeOfDay 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey LocalTime 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey ZonedTime 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey DayOfWeek 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey UUID 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey PackageNameP Source # 
Instance details

Defined in Pantry.Types

(ToJSONKey a, ToJSON a) => ToJSONKey [a] 
Instance details

Defined in Data.Aeson.Types.ToJSON

HasResolution a => ToJSONKey (Fixed a) 
Instance details

Defined in Data.Aeson.Types.ToJSON

ToJSONKey a => ToJSONKey (Identity a) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Text a => ToJSONKey (CabalString a) Source # 
Instance details

Defined in Pantry.Types

(ToJSON a, ToJSON b) => ToJSONKey (a, b) 
Instance details

Defined in Data.Aeson.Types.ToJSON

(ToJSON a, ToJSON b, ToJSON c) => ToJSONKey (a, b, c) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSONKey :: ToJSONKeyFunction (a, b, c) #

toJSONKeyList :: ToJSONKeyFunction [(a, b, c)] #

ToJSONKey b => ToJSONKey (Tagged a b) 
Instance details

Defined in Data.Aeson.Types.ToJSON

(ToJSON a, ToJSON b, ToJSON c, ToJSON d) => ToJSONKey (a, b, c, d) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

toJSONKey :: ToJSONKeyFunction (a, b, c, d) #

toJSONKeyList :: ToJSONKeyFunction [(a, b, c, d)] #

data ToJSONKeyFunction a #

Constructors

ToJSONKeyText !(a -> Text) !(a -> Encoding' Text)

key is encoded to string, produces object

ToJSONKeyValue !(a -> Value) !(a -> Encoding)

key is encoded to value, produces array

Instances
Contravariant ToJSONKeyFunction 
Instance details

Defined in Data.Aeson.Types.ToJSON

class GetConName f => GToJSONKey (f :: k -> Type) #

Instances
GetConName f => GToJSONKey (f :: k -> Type) 
Instance details

Defined in Data.Aeson.Types.ToJSON

class ToJSON1 (f :: Type -> Type) where #

Lifting of the ToJSON class to unary type constructors.

Instead of manually writing your ToJSON1 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 toJSON1.

To use the second, simply add a deriving Generic1 clause to your datatype and declare a ToJSON1 instance for your datatype without giving definitions for liftToJSON or liftToEncoding.

For example:

{-# LANGUAGE DeriveGeneric #-}

import GHC.Generics

data Pair = Pair { pairFst :: a, pairSnd :: b } deriving Generic1

instance ToJSON a => ToJSON1 (Pair a)

If the default implementation doesn't give exactly the results you want, you can customize the generic encoding with only a tiny amount of effort, using genericLiftToJSON and genericLiftToEncoding with your preferred Options:

customOptions = defaultOptions
                { fieldLabelModifier = map toUpper
                }

instance ToJSON a => ToJSON1 (Pair a) where
    liftToJSON     = genericLiftToJSON customOptions
    liftToEncoding = genericLiftToEncoding customOptions

See also ToJSON.

Minimal complete definition

Nothing

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> f a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [f a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> f a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [f a] -> Encoding #

Instances
ToJSON1 [] 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

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

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

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

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

ToJSON1 Maybe 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> Maybe a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Maybe a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Maybe a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Maybe a] -> Encoding #

ToJSON1 Last 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> Last a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Last a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Last a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Last a] -> Encoding #

ToJSON1 Min 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> Min a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Min a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Min a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Min a] -> Encoding #

ToJSON1 Max 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> Max a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Max a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Max a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Max a] -> Encoding #

ToJSON1 First 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> First a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [First a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> First a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [First a] -> Encoding #

ToJSON1 WrappedMonoid 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> WrappedMonoid a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [WrappedMonoid a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> WrappedMonoid a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [WrappedMonoid a] -> Encoding #

ToJSON1 Option 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> Option a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Option a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Option a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Option a] -> Encoding #

ToJSON1 Identity 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> Identity a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Identity a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Identity a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Identity a] -> Encoding #

ToJSON1 First 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> First a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [First a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> First a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [First a] -> Encoding #

ToJSON1 Last 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> Last a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Last a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Last a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Last a] -> Encoding #

ToJSON1 Dual 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> Dual a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Dual a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Dual a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Dual a] -> Encoding #

ToJSON1 NonEmpty 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> NonEmpty a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [NonEmpty a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> NonEmpty a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [NonEmpty a] -> Encoding #

ToJSON1 IntMap 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> IntMap a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [IntMap a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> IntMap a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [IntMap a] -> Encoding #

ToJSON1 Tree 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> Tree a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Tree a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Tree a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Tree a] -> Encoding #

ToJSON1 Seq 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> Seq a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Seq a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Seq a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Seq a] -> Encoding #

ToJSON1 Set 
Instance details

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 #

ToJSON1 DList 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> DList a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [DList a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> DList a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [DList a] -> Encoding #

ToJSON1 Vector 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> Vector a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Vector a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Vector a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Vector a] -> Encoding #

ToJSON1 HashSet 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> HashSet a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [HashSet a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> HashSet a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [HashSet a] -> Encoding #

ToJSON a => ToJSON1 (Either a) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a0 -> Value) -> ([a0] -> Value) -> Either a a0 -> Value #

liftToJSONList :: (a0 -> Value) -> ([a0] -> Value) -> [Either a a0] -> Value #

liftToEncoding :: (a0 -> Encoding) -> ([a0] -> Encoding) -> Either a a0 -> Encoding #

liftToEncodingList :: (a0 -> Encoding) -> ([a0] -> Encoding) -> [Either a a0] -> Encoding #

ToJSON a => ToJSON1 ((,) a) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a0 -> Value) -> ([a0] -> Value) -> (a, a0) -> Value #

liftToJSONList :: (a0 -> Value) -> ([a0] -> Value) -> [(a, a0)] -> Value #

liftToEncoding :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (a, a0) -> Encoding #

liftToEncodingList :: (a0 -> Encoding) -> ([a0] -> Encoding) -> [(a, a0)] -> Encoding #

ToJSONKey k => ToJSON1 (Map k) 
Instance details

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 #

ToJSONKey k => ToJSON1 (HashMap k) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> HashMap k a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [HashMap k a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> HashMap k a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [HashMap k a] -> Encoding #

ToJSON1 (Proxy :: Type -> Type) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

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

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

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

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

(ToJSON a, ToJSON b) => ToJSON1 ((,,) a b) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a0 -> Value) -> ([a0] -> Value) -> (a, b, a0) -> Value #

liftToJSONList :: (a0 -> Value) -> ([a0] -> Value) -> [(a, b, a0)] -> Value #

liftToEncoding :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (a, b, a0) -> Encoding #

liftToEncodingList :: (a0 -> Encoding) -> ([a0] -> Encoding) -> [(a, b, a0)] -> Encoding #

ToJSON a => ToJSON1 (Const a :: Type -> Type) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a0 -> Value) -> ([a0] -> Value) -> Const a a0 -> Value #

liftToJSONList :: (a0 -> Value) -> ([a0] -> Value) -> [Const a a0] -> Value #

liftToEncoding :: (a0 -> Encoding) -> ([a0] -> Encoding) -> Const a a0 -> Encoding #

liftToEncodingList :: (a0 -> Encoding) -> ([a0] -> Encoding) -> [Const a a0] -> Encoding #

ToJSON1 (Tagged a) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a0 -> Value) -> ([a0] -> Value) -> Tagged a a0 -> Value #

liftToJSONList :: (a0 -> Value) -> ([a0] -> Value) -> [Tagged a a0] -> Value #

liftToEncoding :: (a0 -> Encoding) -> ([a0] -> Encoding) -> Tagged a a0 -> Encoding #

liftToEncodingList :: (a0 -> Encoding) -> ([a0] -> Encoding) -> [Tagged a a0] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c) => ToJSON1 ((,,,) a b c) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a0 -> Value) -> ([a0] -> Value) -> (a, b, c, a0) -> Value #

liftToJSONList :: (a0 -> Value) -> ([a0] -> Value) -> [(a, b, c, a0)] -> Value #

liftToEncoding :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (a, b, c, a0) -> Encoding #

liftToEncodingList :: (a0 -> Encoding) -> ([a0] -> Encoding) -> [(a, b, c, a0)] -> Encoding #

(ToJSON1 f, ToJSON1 g) => ToJSON1 (Product f g) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> Product f g a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Product f g a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Product f g a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Product f g a] -> Encoding #

(ToJSON1 f, ToJSON1 g) => ToJSON1 (Sum f g) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> Sum f g a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Sum f g a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Sum f g a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Sum f g a] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d) => ToJSON1 ((,,,,) a b c d) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a0 -> Value) -> ([a0] -> Value) -> (a, b, c, d, a0) -> Value #

liftToJSONList :: (a0 -> Value) -> ([a0] -> Value) -> [(a, b, c, d, a0)] -> Value #

liftToEncoding :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (a, b, c, d, a0) -> Encoding #

liftToEncodingList :: (a0 -> Encoding) -> ([a0] -> Encoding) -> [(a, b, c, d, a0)] -> Encoding #

(ToJSON1 f, ToJSON1 g) => ToJSON1 (Compose f g) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a -> Value) -> ([a] -> Value) -> Compose f g a -> Value #

liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [Compose f g a] -> Value #

liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> Compose f g a -> Encoding #

liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [Compose f g a] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e) => ToJSON1 ((,,,,,) a b c d e) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a0 -> Value) -> ([a0] -> Value) -> (a, b, c, d, e, a0) -> Value #

liftToJSONList :: (a0 -> Value) -> ([a0] -> Value) -> [(a, b, c, d, e, a0)] -> Value #

liftToEncoding :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (a, b, c, d, e, a0) -> Encoding #

liftToEncodingList :: (a0 -> Encoding) -> ([a0] -> Encoding) -> [(a, b, c, d, e, a0)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f) => ToJSON1 ((,,,,,,) a b c d e f) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a0 -> Value) -> ([a0] -> Value) -> (a, b, c, d, e, f, a0) -> Value #

liftToJSONList :: (a0 -> Value) -> ([a0] -> Value) -> [(a, b, c, d, e, f, a0)] -> Value #

liftToEncoding :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (a, b, c, d, e, f, a0) -> Encoding #

liftToEncodingList :: (a0 -> Encoding) -> ([a0] -> Encoding) -> [(a, b, c, d, e, f, a0)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g) => ToJSON1 ((,,,,,,,) a b c d e f g) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a0 -> Value) -> ([a0] -> Value) -> (a, b, c, d, e, f, g, a0) -> Value #

liftToJSONList :: (a0 -> Value) -> ([a0] -> Value) -> [(a, b, c, d, e, f, g, a0)] -> Value #

liftToEncoding :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (a, b, c, d, e, f, g, a0) -> Encoding #

liftToEncodingList :: (a0 -> Encoding) -> ([a0] -> Encoding) -> [(a, b, c, d, e, f, g, a0)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g, ToJSON h) => ToJSON1 ((,,,,,,,,) a b c d e f g h) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a0 -> Value) -> ([a0] -> Value) -> (a, b, c, d, e, f, g, h, a0) -> Value #

liftToJSONList :: (a0 -> Value) -> ([a0] -> Value) -> [(a, b, c, d, e, f, g, h, a0)] -> Value #

liftToEncoding :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (a, b, c, d, e, f, g, h, a0) -> Encoding #

liftToEncodingList :: (a0 -> Encoding) -> ([a0] -> Encoding) -> [(a, b, c, d, e, f, g, h, a0)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g, ToJSON h, ToJSON i) => ToJSON1 ((,,,,,,,,,) a b c d e f g h i) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a0 -> Value) -> ([a0] -> Value) -> (a, b, c, d, e, f, g, h, i, a0) -> Value #

liftToJSONList :: (a0 -> Value) -> ([a0] -> Value) -> [(a, b, c, d, e, f, g, h, i, a0)] -> Value #

liftToEncoding :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (a, b, c, d, e, f, g, h, i, a0) -> Encoding #

liftToEncodingList :: (a0 -> Encoding) -> ([a0] -> Encoding) -> [(a, b, c, d, e, f, g, h, i, a0)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g, ToJSON h, ToJSON i, ToJSON j) => ToJSON1 ((,,,,,,,,,,) a b c d e f g h i j) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a0 -> Value) -> ([a0] -> Value) -> (a, b, c, d, e, f, g, h, i, j, a0) -> Value #

liftToJSONList :: (a0 -> Value) -> ([a0] -> Value) -> [(a, b, c, d, e, f, g, h, i, j, a0)] -> Value #

liftToEncoding :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (a, b, c, d, e, f, g, h, i, j, a0) -> Encoding #

liftToEncodingList :: (a0 -> Encoding) -> ([a0] -> Encoding) -> [(a, b, c, d, e, f, g, h, i, j, a0)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g, ToJSON h, ToJSON i, ToJSON j, ToJSON k) => ToJSON1 ((,,,,,,,,,,,) a b c d e f g h i j k) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a0 -> Value) -> ([a0] -> Value) -> (a, b, c, d, e, f, g, h, i, j, k, a0) -> Value #

liftToJSONList :: (a0 -> Value) -> ([a0] -> Value) -> [(a, b, c, d, e, f, g, h, i, j, k, a0)] -> Value #

liftToEncoding :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (a, b, c, d, e, f, g, h, i, j, k, a0) -> Encoding #

liftToEncodingList :: (a0 -> Encoding) -> ([a0] -> Encoding) -> [(a, b, c, d, e, f, g, h, i, j, k, a0)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g, ToJSON h, ToJSON i, ToJSON j, ToJSON k, ToJSON l) => ToJSON1 ((,,,,,,,,,,,,) a b c d e f g h i j k l) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a0 -> Value) -> ([a0] -> Value) -> (a, b, c, d, e, f, g, h, i, j, k, l, a0) -> Value #

liftToJSONList :: (a0 -> Value) -> ([a0] -> Value) -> [(a, b, c, d, e, f, g, h, i, j, k, l, a0)] -> Value #

liftToEncoding :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (a, b, c, d, e, f, g, h, i, j, k, l, a0) -> Encoding #

liftToEncodingList :: (a0 -> Encoding) -> ([a0] -> Encoding) -> [(a, b, c, d, e, f, g, h, i, j, k, l, a0)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g, ToJSON h, ToJSON i, ToJSON j, ToJSON k, ToJSON l, ToJSON m) => ToJSON1 ((,,,,,,,,,,,,,) a b c d e f g h i j k l m) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a0 -> Value) -> ([a0] -> Value) -> (a, b, c, d, e, f, g, h, i, j, k, l, m, a0) -> Value #

liftToJSONList :: (a0 -> Value) -> ([a0] -> Value) -> [(a, b, c, d, e, f, g, h, i, j, k, l, m, a0)] -> Value #

liftToEncoding :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (a, b, c, d, e, f, g, h, i, j, k, l, m, a0) -> Encoding #

liftToEncodingList :: (a0 -> Encoding) -> ([a0] -> Encoding) -> [(a, b, c, d, e, f, g, h, i, j, k, l, m, a0)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g, ToJSON h, ToJSON i, ToJSON j, ToJSON k, ToJSON l, ToJSON m, ToJSON n) => ToJSON1 ((,,,,,,,,,,,,,,) a b c d e f g h i j k l m n) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON :: (a0 -> Value) -> ([a0] -> Value) -> (a, b, c, d, e, f, g, h, i, j, k, l, m, n, a0) -> Value #

liftToJSONList :: (a0 -> Value) -> ([a0] -> Value) -> [(a, b, c, d, e, f, g, h, i, j, k, l, m, n, a0)] -> Value #

liftToEncoding :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (a, b, c, d, e, f, g, h, i, j, k, l, m, n, a0) -> Encoding #

liftToEncodingList :: (a0 -> Encoding) -> ([a0] -> Encoding) -> [(a, b, c, d, e, f, g, h, i, j, k, l, m, n, a0)] -> Encoding #

class ToJSON2 (f :: Type -> Type -> Type) where #

Lifting of the ToJSON class to binary type constructors.

Instead of manually writing your ToJSON2 instance, Data.Aeson.TH provides Template Haskell functions which will derive an instance at compile time.

The compiler cannot provide a default generic implementation for liftToJSON2, unlike toJSON and liftToJSON.

Minimal complete definition

liftToJSON2, liftToEncoding2

Methods

liftToJSON2 :: (a -> Value) -> ([a] -> Value) -> (b -> Value) -> ([b] -> Value) -> f a b -> Value #

liftToJSONList2 :: (a -> Value) -> ([a] -> Value) -> (b -> Value) -> ([b] -> Value) -> [f a b] -> Value #

liftToEncoding2 :: (a -> Encoding) -> ([a] -> Encoding) -> (b -> Encoding) -> ([b] -> Encoding) -> f a b -> Encoding #

liftToEncodingList2 :: (a -> Encoding) -> ([a] -> Encoding) -> (b -> Encoding) -> ([b] -> Encoding) -> [f a b] -> Encoding #

Instances
ToJSON2 Either 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON2 :: (a -> Value) -> ([a] -> Value) -> (b -> Value) -> ([b] -> Value) -> Either a b -> Value #

liftToJSONList2 :: (a -> Value) -> ([a] -> Value) -> (b -> Value) -> ([b] -> Value) -> [Either a b] -> Value #

liftToEncoding2 :: (a -> Encoding) -> ([a] -> Encoding) -> (b -> Encoding) -> ([b] -> Encoding) -> Either a b -> Encoding #

liftToEncodingList2 :: (a -> Encoding) -> ([a] -> Encoding) -> (b -> Encoding) -> ([b] -> Encoding) -> [Either a b] -> Encoding #

ToJSON2 (,) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON2 :: (a -> Value) -> ([a] -> Value) -> (b -> Value) -> ([b] -> Value) -> (a, b) -> Value #

liftToJSONList2 :: (a -> Value) -> ([a] -> Value) -> (b -> Value) -> ([b] -> Value) -> [(a, b)] -> Value #

liftToEncoding2 :: (a -> Encoding) -> ([a] -> Encoding) -> (b -> Encoding) -> ([b] -> Encoding) -> (a, b) -> Encoding #

liftToEncodingList2 :: (a -> Encoding) -> ([a] -> Encoding) -> (b -> Encoding) -> ([b] -> Encoding) -> [(a, b)] -> Encoding #

ToJSON a => ToJSON2 ((,,) a) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON2 :: (a0 -> Value) -> ([a0] -> Value) -> (b -> Value) -> ([b] -> Value) -> (a, a0, b) -> Value #

liftToJSONList2 :: (a0 -> Value) -> ([a0] -> Value) -> (b -> Value) -> ([b] -> Value) -> [(a, a0, b)] -> Value #

liftToEncoding2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b -> Encoding) -> ([b] -> Encoding) -> (a, a0, b) -> Encoding #

liftToEncodingList2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b -> Encoding) -> ([b] -> Encoding) -> [(a, a0, b)] -> Encoding #

ToJSON2 (Const :: Type -> Type -> Type) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON2 :: (a -> Value) -> ([a] -> Value) -> (b -> Value) -> ([b] -> Value) -> Const a b -> Value #

liftToJSONList2 :: (a -> Value) -> ([a] -> Value) -> (b -> Value) -> ([b] -> Value) -> [Const a b] -> Value #

liftToEncoding2 :: (a -> Encoding) -> ([a] -> Encoding) -> (b -> Encoding) -> ([b] -> Encoding) -> Const a b -> Encoding #

liftToEncodingList2 :: (a -> Encoding) -> ([a] -> Encoding) -> (b -> Encoding) -> ([b] -> Encoding) -> [Const a b] -> Encoding #

ToJSON2 (Tagged :: Type -> Type -> Type) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON2 :: (a -> Value) -> ([a] -> Value) -> (b -> Value) -> ([b] -> Value) -> Tagged a b -> Value #

liftToJSONList2 :: (a -> Value) -> ([a] -> Value) -> (b -> Value) -> ([b] -> Value) -> [Tagged a b] -> Value #

liftToEncoding2 :: (a -> Encoding) -> ([a] -> Encoding) -> (b -> Encoding) -> ([b] -> Encoding) -> Tagged a b -> Encoding #

liftToEncodingList2 :: (a -> Encoding) -> ([a] -> Encoding) -> (b -> Encoding) -> ([b] -> Encoding) -> [Tagged a b] -> Encoding #

(ToJSON a, ToJSON b) => ToJSON2 ((,,,) a b) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> (a, b, a0, b0) -> Value #

liftToJSONList2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> [(a, b, a0, b0)] -> Value #

liftToEncoding2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> (a, b, a0, b0) -> Encoding #

liftToEncodingList2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> [(a, b, a0, b0)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c) => ToJSON2 ((,,,,) a b c) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> (a, b, c, a0, b0) -> Value #

liftToJSONList2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> [(a, b, c, a0, b0)] -> Value #

liftToEncoding2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> (a, b, c, a0, b0) -> Encoding #

liftToEncodingList2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> [(a, b, c, a0, b0)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d) => ToJSON2 ((,,,,,) a b c d) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> (a, b, c, d, a0, b0) -> Value #

liftToJSONList2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> [(a, b, c, d, a0, b0)] -> Value #

liftToEncoding2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> (a, b, c, d, a0, b0) -> Encoding #

liftToEncodingList2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> [(a, b, c, d, a0, b0)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e) => ToJSON2 ((,,,,,,) a b c d e) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> (a, b, c, d, e, a0, b0) -> Value #

liftToJSONList2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> [(a, b, c, d, e, a0, b0)] -> Value #

liftToEncoding2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> (a, b, c, d, e, a0, b0) -> Encoding #

liftToEncodingList2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> [(a, b, c, d, e, a0, b0)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f) => ToJSON2 ((,,,,,,,) a b c d e f) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> (a, b, c, d, e, f, a0, b0) -> Value #

liftToJSONList2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> [(a, b, c, d, e, f, a0, b0)] -> Value #

liftToEncoding2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> (a, b, c, d, e, f, a0, b0) -> Encoding #

liftToEncodingList2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> [(a, b, c, d, e, f, a0, b0)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g) => ToJSON2 ((,,,,,,,,) a b c d e f g) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> (a, b, c, d, e, f, g, a0, b0) -> Value #

liftToJSONList2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> [(a, b, c, d, e, f, g, a0, b0)] -> Value #

liftToEncoding2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> (a, b, c, d, e, f, g, a0, b0) -> Encoding #

liftToEncodingList2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> [(a, b, c, d, e, f, g, a0, b0)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g, ToJSON h) => ToJSON2 ((,,,,,,,,,) a b c d e f g h) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> (a, b, c, d, e, f, g, h, a0, b0) -> Value #

liftToJSONList2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> [(a, b, c, d, e, f, g, h, a0, b0)] -> Value #

liftToEncoding2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> (a, b, c, d, e, f, g, h, a0, b0) -> Encoding #

liftToEncodingList2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> [(a, b, c, d, e, f, g, h, a0, b0)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g, ToJSON h, ToJSON i) => ToJSON2 ((,,,,,,,,,,) a b c d e f g h i) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> (a, b, c, d, e, f, g, h, i, a0, b0) -> Value #

liftToJSONList2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> [(a, b, c, d, e, f, g, h, i, a0, b0)] -> Value #

liftToEncoding2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> (a, b, c, d, e, f, g, h, i, a0, b0) -> Encoding #

liftToEncodingList2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> [(a, b, c, d, e, f, g, h, i, a0, b0)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g, ToJSON h, ToJSON i, ToJSON j) => ToJSON2 ((,,,,,,,,,,,) a b c d e f g h i j) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> (a, b, c, d, e, f, g, h, i, j, a0, b0) -> Value #

liftToJSONList2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> [(a, b, c, d, e, f, g, h, i, j, a0, b0)] -> Value #

liftToEncoding2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> (a, b, c, d, e, f, g, h, i, j, a0, b0) -> Encoding #

liftToEncodingList2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> [(a, b, c, d, e, f, g, h, i, j, a0, b0)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g, ToJSON h, ToJSON i, ToJSON j, ToJSON k) => ToJSON2 ((,,,,,,,,,,,,) a b c d e f g h i j k) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> (a, b, c, d, e, f, g, h, i, j, k, a0, b0) -> Value #

liftToJSONList2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> [(a, b, c, d, e, f, g, h, i, j, k, a0, b0)] -> Value #

liftToEncoding2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> (a, b, c, d, e, f, g, h, i, j, k, a0, b0) -> Encoding #

liftToEncodingList2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> [(a, b, c, d, e, f, g, h, i, j, k, a0, b0)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g, ToJSON h, ToJSON i, ToJSON j, ToJSON k, ToJSON l) => ToJSON2 ((,,,,,,,,,,,,,) a b c d e f g h i j k l) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> (a, b, c, d, e, f, g, h, i, j, k, l, a0, b0) -> Value #

liftToJSONList2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> [(a, b, c, d, e, f, g, h, i, j, k, l, a0, b0)] -> Value #

liftToEncoding2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> (a, b, c, d, e, f, g, h, i, j, k, l, a0, b0) -> Encoding #

liftToEncodingList2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> [(a, b, c, d, e, f, g, h, i, j, k, l, a0, b0)] -> Encoding #

(ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g, ToJSON h, ToJSON i, ToJSON j, ToJSON k, ToJSON l, ToJSON m) => ToJSON2 ((,,,,,,,,,,,,,,) a b c d e f g h i j k l m) 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

liftToJSON2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> (a, b, c, d, e, f, g, h, i, j, k, l, m, a0, b0) -> Value #

liftToJSONList2 :: (a0 -> Value) -> ([a0] -> Value) -> (b0 -> Value) -> ([b0] -> Value) -> [(a, b, c, d, e, f, g, h, i, j, k, l, m, a0, b0)] -> Value #

liftToEncoding2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> (a, b, c, d, e, f, g, h, i, j, k, l, m, a0, b0) -> Encoding #

liftToEncodingList2 :: (a0 -> Encoding) -> ([a0] -> Encoding) -> (b0 -> Encoding) -> ([b0] -> Encoding) -> [(a, b, c, d, e, f, g, h, i, j, k, l, m, a0, b0)] -> Encoding #

pairs :: Series -> Encoding #

Encode a series of key/value pairs, separated by commas.

fromEncoding :: Encoding' tag -> Builder #

Acquire the underlying bytestring builder.

type Encoding = Encoding' Value #

Often used synonym for Encoding'.

data Series #

A series of values that, when encoded, should be separated by commas. Since 0.11.0.0, the .= operator is overloaded to create either (Text, Value) or Series. You can use Series when encoding directly to a bytestring builder as in the following example:

toEncoding (Person name age) = pairs ("name" .= name <> "age" .= age)
Instances
Semigroup Series 
Instance details

Defined in Data.Aeson.Encoding.Internal

Monoid Series 
Instance details

Defined in Data.Aeson.Encoding.Internal

KeyValue Series 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

(.=) :: ToJSON v => Text -> v -> Series #

e ~ Encoding => KeyValuePair e Series 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

pair :: String -> e -> Series

a ~ Value => FromPairs (Encoding' a) Series 
Instance details

Defined in Data.Aeson.Types.ToJSON

Methods

fromPairs :: Series -> Encoding' a

(.!=) :: Parser (Maybe a) -> a -> Parser a #

Helper for use in combination with .:? to provide default values for optional JSON object fields.

This combinator is most useful if the key and value can be absent from an object without affecting its validity and we know a default value to assign in that case. If the key and value are mandatory, use .: instead.

Example usage:

 v1 <- o .:? "opt_field_with_dfl" .!= "default_val"
 v2 <- o .:  "mandatory_field"
 v3 <- o .:? "opt_field2"

(.:!) :: FromJSON a => Object -> Text -> Parser (Maybe a) #

Retrieve the value associated with the given key of an Object. The result is Nothing if the key is not present or empty if the value cannot be converted to the desired type.

This differs from .:? by attempting to parse Null the same as any other JSON value, instead of interpreting it as Nothing.

fromJSON :: FromJSON a => Value -> Result a #

Convert a value from JSON, failing if the types do not match.

withEmbeddedJSON :: String -> (Value -> Parser a) -> Value -> Parser a #

Decode a nested JSON-encoded string.

withBool :: String -> (Bool -> Parser a) -> Value -> Parser a #

withBool expected f value applies f to the Value when value is a Boolean and fails otherwise.

Error message example

withBool "MyType" f (String "oops")
-- Error: "parsing MyType failed, expected Boolean, but encountered String"

withScientific :: String -> (Scientific -> Parser a) -> Value -> Parser a #

withScientific name f value applies f to the Scientific number when value is a Number and fails using typeMismatch otherwise.

Warning: If you are converting from a scientific to an unbounded type such as Integer you may want to add a restriction on the size of the exponent (see withBoundedScientific) to prevent malicious input from filling up the memory of the target system.

Error message example

withScientific "MyType" f (String "oops")
-- Error: "parsing MyType failed, expected Number, but encountered String"

withArray :: String -> (Array -> Parser a) -> Value -> Parser a #

withArray expected f value applies f to the Array when value is an Array and fails otherwise.

Error message example

withArray "MyType" f (String "oops")
-- Error: "parsing MyType failed, expected Array, but encountered String"

withText :: String -> (Text -> Parser a) -> Value -> Parser a #

withText name f value applies f to the Text when value is a String and fails otherwise.

Error message example

withText "MyType" f Null
-- Error: "parsing MyType failed, expected String, but encountered Null"

withObject :: String -> (Object -> Parser a) -> Value -> Parser a #

withObject name f value applies f to the Object when value is an Object and fails otherwise.

Error message example

withObject "MyType" f (String "oops")
-- Error: "parsing MyType failed, expected Object, but encountered String"

parseJSON2 :: (FromJSON2 f, FromJSON a, FromJSON b) => Value -> Parser (f a b) #

Lift the standard parseJSON function through the type constructor.

parseJSON1 :: (FromJSON1 f, FromJSON a) => Value -> Parser (f a) #

Lift the standard parseJSON function through the type constructor.

genericFromJSONKey :: (Generic a, GFromJSONKey (Rep a)) => JSONKeyOptions -> FromJSONKeyFunction a #

fromJSONKey for Generic types. These types must be sums of nullary constructors, whose names will be used as keys for JSON objects.

See also genericToJSONKey.

Example

Expand
data Color = Red | Green | Blue
  deriving Generic

instance FromJSONKey Color where
  fromJSONKey = genericFromJSONKey defaultJSONKeyOptions

genericLiftParseJSON :: (Generic1 f, GFromJSON One (Rep1 f)) => Options -> (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser (f a) #

A configurable generic JSON decoder. This function applied to defaultOptions is used as the default for liftParseJSON when the type is an instance of Generic1.

genericParseJSON :: (Generic a, GFromJSON Zero (Rep a)) => Options -> Value -> Parser a #

A configurable generic JSON decoder. This function applied to defaultOptions is used as the default for parseJSON when the type is an instance of Generic.

class GFromJSON arity (f :: Type -> Type) where #

Class of generic representation types that can be converted from JSON.

Methods

gParseJSON :: Options -> FromArgs arity a -> Value -> Parser (f a) #

This method (applied to defaultOptions) is used as the default generic implementation of parseJSON (if the arity is Zero) or liftParseJSON (if the arity is One).

Instances
GFromJSON One Par1 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

gParseJSON :: Options -> FromArgs One a -> Value -> Parser (Par1 a) #

GFromJSON arity (V1 :: Type -> Type) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

gParseJSON :: Options -> FromArgs arity a -> Value -> Parser (V1 a) #

FromJSON1 f => GFromJSON One (Rec1 f) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

gParseJSON :: Options -> FromArgs One a -> Value -> Parser (Rec1 f a) #

(GFromJSON' arity a, Datatype d) => GFromJSON arity (D1 d a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

gParseJSON :: Options -> FromArgs arity a0 -> Value -> Parser (D1 d a a0) #

FromJSON a => GFromJSON arity (K1 i a :: Type -> Type) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

gParseJSON :: Options -> FromArgs arity a0 -> Value -> Parser (K1 i a a0) #

GFromJSON arity a => GFromJSON arity (M1 i c a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

gParseJSON :: Options -> FromArgs arity a0 -> Value -> Parser (M1 i c a a0) #

(FromJSON1 f, GFromJSON One g) => GFromJSON One (f :.: g) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

gParseJSON :: Options -> FromArgs One a -> Value -> Parser ((f :.: g) a) #

data FromArgs arity a where #

A FromArgs value either stores nothing (for FromJSON) or it stores the two function arguments that decode occurrences of the type parameter (for FromJSON1).

Constructors

NoFromArgs :: forall arity a. FromArgs Zero a 
From1Args :: forall arity a. (Value -> Parser a) -> (Value -> Parser [a]) -> FromArgs One a 

class FromJSON a where #

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:

  • fail yields a custom error message: it is the recommended way of reporting a failure;
  • empty (or mzero) is uninformative: use it when the error is meant to be caught by some (<|>);
  • typeMismatch can be used to report a failure when the encountered value is not of the expected JSON type; unexpected is 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 write Text literals.
{-# LANGUAGE OverloadedStrings #-}

data Coord = Coord { x :: Double, y :: Double }

instance FromJSON Coord where
    parseJSON (Object v) = Coord
        <$> v .: "x"
        <*> v .: "y"

    -- We do not expect a non-Object value here.
    -- We could use empty to fail, but typeMismatch
    -- gives a much more informative error message.
    parseJSON invalid    =
        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:

instance FromJSON Coord where
    parseJSON = 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 Generic clause to your datatype and declare a FromJSON 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 = genericParseJSON defaultOptions; if you need different options, you can customize the generic decoding by defining:

customOptions = defaultOptions
                { fieldLabelModifier = map toUpper
                }

instance FromJSON Coord where
    parseJSON = genericParseJSON customOptions

Minimal complete definition

Nothing

Methods

parseJSON :: Value -> Parser a #

parseJSONList :: Value -> Parser [a] #

Instances
FromJSON Bool 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON Char 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON Double 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON Float 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON Int 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON Int8 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON Int16 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON Int32 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON Int64 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON Integer

This instance includes a bounds check to prevent maliciously large inputs to fill up the memory of the target system. You can newtype Scientific and provide your own instance using withScientific if you want to allow larger inputs.

Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON Natural 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON Ordering 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON Word 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON Word8 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON Word16 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON Word32 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON Word64 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON () 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser () #

parseJSONList :: Value -> Parser [()] #

FromJSON Version 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON Scientific 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON Text 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON UTCTime 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON Value 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON DotNetTime 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON Text 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON Void 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON CTime 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON IntSet 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON DiffTime

This instance includes a bounds check to prevent maliciously large inputs to fill up the memory of the target system. You can newtype Scientific and provide your own instance using withScientific if you want to allow larger inputs.

Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON PersistValue 
Instance details

Defined in Database.Persist.Types.Base

FromJSON SqliteConf 
Instance details

Defined in Database.Persist.Sqlite

FromJSON SqliteConnectionInfo 
Instance details

Defined in Database.Persist.Sqlite

FromJSON Day 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON NominalDiffTime

This instance includes a bounds check to prevent maliciously large inputs to fill up the memory of the target system. You can newtype Scientific and provide your own instance using withScientific if you want to allow larger inputs.

Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON TimeOfDay 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON LocalTime 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON ZonedTime

Supported string formats:

YYYY-MM-DD HH:MM Z YYYY-MM-DD HH:MM:SS Z YYYY-MM-DD HH:MM:SS.SSS Z

The first space may instead be a T, and the second space is optional. The Z represents UTC. The Z may be replaced with a time zone offset of the form +0000 or -08:00, where the first two digits are hours, the : is optional and the second two digits (also optional) are minutes.

Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON StylesUpdate 
Instance details

Defined in RIO.PrettyPrint.StylesUpdate

FromJSON SystemTime 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON CalendarDiffTime 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON CalendarDiffDays 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON DayOfWeek 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON UUID 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON SHA256 Source # 
Instance details

Defined in Pantry.SHA256

FromJSON WantedCompiler Source # 
Instance details

Defined in Pantry.Types

FromJSON RelFilePath Source # 
Instance details

Defined in Pantry.Types

FromJSON TreeKey Source # 
Instance details

Defined in Pantry.Types

FromJSON PackageIdentifierRevision Source # 
Instance details

Defined in Pantry.Types

FromJSON VersionP Source # 
Instance details

Defined in Pantry.Types

FromJSON PackageNameP Source # 
Instance details

Defined in Pantry.Types

FromJSON BlobKey Source # 
Instance details

Defined in Pantry.Types

FromJSON FileSize Source # 
Instance details

Defined in Pantry.Types

FromJSON a => FromJSON [a] 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser [a] #

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

FromJSON a => FromJSON (Maybe a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

(FromJSON a, Integral a) => FromJSON (Ratio a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON a => FromJSON (Last a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

HasResolution a => FromJSON (Fixed a)

This instance includes a bounds check to prevent maliciously large inputs to fill up the memory of the target system. You can newtype Scientific and provide your own instance using withScientific if you want to allow larger inputs.

Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON a => FromJSON (Min a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

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

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

FromJSON a => FromJSON (Max a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

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

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

FromJSON a => FromJSON (First a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON a => FromJSON (WrappedMonoid a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON a => FromJSON (Option a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON a => FromJSON (Identity a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON a => FromJSON (First a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON a => FromJSON (Last a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON a => FromJSON (Dual a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON a => FromJSON (NonEmpty a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON a => FromJSON (IntMap a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON v => FromJSON (Tree v) 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON a => FromJSON (Seq a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

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

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

(Ord a, FromJSON a) => FromJSON (Set a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

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

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

FromJSON a => FromJSON (DList a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON (Key TreeEntry) Source # 
Instance details

Defined in Pantry.Storage

FromJSON (Key Tree) Source # 
Instance details

Defined in Pantry.Storage

FromJSON (Key Version) Source # 
Instance details

Defined in Pantry.Storage

FromJSON (Key PackageName) Source # 
Instance details

Defined in Pantry.Storage

(Prim a, FromJSON a) => FromJSON (PrimArray a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON a => FromJSON (SmallArray a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON a => FromJSON (Array a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON a => FromJSON (Vector a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

(Storable a, FromJSON a) => FromJSON (Vector a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

(Vector Vector a, FromJSON a) => FromJSON (Vector a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

(Eq a, Hashable a, FromJSON a) => FromJSON (HashSet a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

(Prim a, FromJSON a) => FromJSON (Vector a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON (WithJSONWarnings StylesUpdate) Source # 
Instance details

Defined in Pantry.Internal.AesonExtended

FromJSON (WithJSONWarnings HackageSecurityConfig) Source # 
Instance details

Defined in Pantry.Types

FromJSON (WithJSONWarnings (Unresolved (NonEmpty RawPackageLocationImmutable))) Source # 
Instance details

Defined in Pantry.Types

FromJSON (WithJSONWarnings (Unresolved (NonEmpty RawPackageLocation))) Source # 
Instance details

Defined in Pantry.Types

FromJSON (WithJSONWarnings (Unresolved RawSnapshotLayer)) Source # 
Instance details

Defined in Pantry.Types

FromJSON (WithJSONWarnings (Unresolved SnapshotLocation)) Source # 
Instance details

Defined in Pantry.Types

FromJSON (WithJSONWarnings (Unresolved RawSnapshotLocation)) Source # 
Instance details

Defined in Pantry.Types

FromJSON (WithJSONWarnings (Unresolved PackageLocationImmutable)) Source # 
Instance details

Defined in Pantry.Types

IsCabalString a => FromJSON (CabalString a) Source # 
Instance details

Defined in Pantry.Types

(FromJSON a, FromJSON b) => FromJSON (Either a b) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser (Either a b) #

parseJSONList :: Value -> Parser [Either a b] #

(FromJSON a, FromJSON b) => FromJSON (a, b) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser (a, b) #

parseJSONList :: Value -> Parser [(a, b)] #

(FromJSONKey k, Ord k, FromJSON v) => FromJSON (Map k v) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser (Map k v) #

parseJSONList :: Value -> Parser [Map k v] #

(FromJSON v, FromJSONKey k, Eq k, Hashable k) => FromJSON (HashMap k v) 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON (Proxy a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSON (Path Abs File) 
Instance details

Defined in Path

FromJSON (Path Abs Dir) 
Instance details

Defined in Path

FromJSON (Path Rel File) 
Instance details

Defined in Path

FromJSON (Path Rel Dir) 
Instance details

Defined in Path

(FromJSON a, FromJSON b, FromJSON c) => FromJSON (a, b, c) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser (a, b, c) #

parseJSONList :: Value -> Parser [(a, b, c)] #

FromJSON a => FromJSON (Const a b) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser (Const a b) #

parseJSONList :: Value -> Parser [Const a b] #

FromJSON b => FromJSON (Tagged a b) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser (Tagged a b) #

parseJSONList :: Value -> Parser [Tagged a b] #

(FromJSON a, FromJSON b, FromJSON c, FromJSON d) => FromJSON (a, b, c, d) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser (a, b, c, d) #

parseJSONList :: Value -> Parser [(a, b, c, d)] #

(FromJSON1 f, FromJSON1 g, FromJSON a) => FromJSON (Product f g a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser (Product f g a) #

parseJSONList :: Value -> Parser [Product f g a] #

(FromJSON1 f, FromJSON1 g, FromJSON a) => FromJSON (Sum f g a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser (Sum f g a) #

parseJSONList :: Value -> Parser [Sum f g a] #

(FromJSON a, FromJSON b, FromJSON c, FromJSON d, FromJSON e) => FromJSON (a, b, c, d, e) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser (a, b, c, d, e) #

parseJSONList :: Value -> Parser [(a, b, c, d, e)] #

(FromJSON1 f, FromJSON1 g, FromJSON a) => FromJSON (Compose f g a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser (Compose f g a) #

parseJSONList :: Value -> Parser [Compose f g a] #

(FromJSON a, FromJSON b, FromJSON c, FromJSON d, FromJSON e, FromJSON f) => FromJSON (a, b, c, d, e, f) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser (a, b, c, d, e, f) #

parseJSONList :: Value -> Parser [(a, b, c, d, e, f)] #

(FromJSON a, FromJSON b, FromJSON c, FromJSON d, FromJSON e, FromJSON f, FromJSON g) => FromJSON (a, b, c, d, e, f, g) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser (a, b, c, d, e, f, g) #

parseJSONList :: Value -> Parser [(a, b, c, d, e, f, g)] #

(FromJSON a, FromJSON b, FromJSON c, FromJSON d, FromJSON e, FromJSON f, FromJSON g, FromJSON h) => FromJSON (a, b, c, d, e, f, g, h) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser (a, b, c, d, e, f, g, h) #

parseJSONList :: Value -> Parser [(a, b, c, d, e, f, g, h)] #

(FromJSON a, FromJSON b, FromJSON c, FromJSON d, FromJSON e, FromJSON f, FromJSON g, FromJSON h, FromJSON i) => FromJSON (a, b, c, d, e, f, g, h, i) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser (a, b, c, d, e, f, g, h, i) #

parseJSONList :: Value -> Parser [(a, b, c, d, e, f, g, h, i)] #

(FromJSON a, FromJSON b, FromJSON c, FromJSON d, FromJSON e, FromJSON f, FromJSON g, FromJSON h, FromJSON i, FromJSON j) => FromJSON (a, b, c, d, e, f, g, h, i, j) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser (a, b, c, d, e, f, g, h, i, j) #

parseJSONList :: Value -> Parser [(a, b, c, d, e, f, g, h, i, j)] #

(FromJSON a, FromJSON b, FromJSON c, FromJSON d, FromJSON e, FromJSON f, FromJSON g, FromJSON h, FromJSON i, FromJSON j, FromJSON k) => FromJSON (a, b, c, d, e, f, g, h, i, j, k) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser (a, b, c, d, e, f, g, h, i, j, k) #

parseJSONList :: Value -> Parser [(a, b, c, d, e, f, g, h, i, j, k)] #

(FromJSON a, FromJSON b, FromJSON c, FromJSON d, FromJSON e, FromJSON f, FromJSON g, FromJSON h, FromJSON i, FromJSON j, FromJSON k, FromJSON l) => FromJSON (a, b, c, d, e, f, g, h, i, j, k, l) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser (a, b, c, d, e, f, g, h, i, j, k, l) #

parseJSONList :: Value -> Parser [(a, b, c, d, e, f, g, h, i, j, k, l)] #

(FromJSON a, FromJSON b, FromJSON c, FromJSON d, FromJSON e, FromJSON f, FromJSON g, FromJSON h, FromJSON i, FromJSON j, FromJSON k, FromJSON l, FromJSON m) => FromJSON (a, b, c, d, e, f, g, h, i, j, k, l, m) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser (a, b, c, d, e, f, g, h, i, j, k, l, m) #

parseJSONList :: Value -> Parser [(a, b, c, d, e, f, g, h, i, j, k, l, m)] #

(FromJSON a, FromJSON b, FromJSON c, FromJSON d, FromJSON e, FromJSON f, FromJSON g, FromJSON h, FromJSON i, FromJSON j, FromJSON k, FromJSON l, FromJSON m, FromJSON n) => FromJSON (a, b, c, d, e, f, g, h, i, j, k, l, m, n) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser (a, b, c, d, e, f, g, h, i, j, k, l, m, n) #

parseJSONList :: Value -> Parser [(a, b, c, d, e, f, g, h, i, j, k, l, m, n)] #

(FromJSON a, FromJSON b, FromJSON c, FromJSON d, FromJSON e, FromJSON f, FromJSON g, FromJSON h, FromJSON i, FromJSON j, FromJSON k, FromJSON l, FromJSON m, FromJSON n, FromJSON o) => FromJSON (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

parseJSON :: Value -> Parser (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o) #

parseJSONList :: Value -> Parser [(a, b, c, d, e, f, g, h, i, j, k, l, m, n, o)] #

class FromJSONKey a where #

Read the docs for ToJSONKey first. This class is a conversion in the opposite direction. If you have a newtype wrapper around Text, the recommended way to define instances is with generalized newtype deriving:

newtype SomeId = SomeId { getSomeId :: Text }
  deriving (Eq,Ord,Hashable,FromJSONKey)

If you have a sum of nullary constructors, you may use the generic implementation:

data Color = Red | Green | Blue
  deriving Generic

instance FromJSONKey Color where
  fromJSONKey = genericFromJSONKey defaultJSONKeyOptions

Minimal complete definition

Nothing

Methods

fromJSONKey :: FromJSONKeyFunction a #

Strategy for parsing the key of a map-like container.

fromJSONKeyList :: FromJSONKeyFunction [a] #

This is similar in spirit to the readList method of Read. It makes it possible to give Value keys special treatment without using OverlappingInstances. End users should always be able to use the default implementation of this method.

Instances
FromJSONKey Bool 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey Char 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey Double 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey Float 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey Int 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey Int8 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey Int16 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey Int32 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey Int64 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey Integer 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey Natural 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey Word 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey Word8 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey Word16 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey Word32 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey Word64 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey Version 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey Text 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey UTCTime 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey Text 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey Day 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey TimeOfDay 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey LocalTime 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey ZonedTime 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey DayOfWeek 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey UUID 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey WantedCompiler Source # 
Instance details

Defined in Pantry.Types

FromJSONKey PackageNameP Source # 
Instance details

Defined in Pantry.Types

(FromJSONKey a, FromJSON a) => FromJSONKey [a] 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey a => FromJSONKey (Identity a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

IsCabalString a => FromJSONKey (CabalString a) Source # 
Instance details

Defined in Pantry.Types

(FromJSON a, FromJSON b) => FromJSONKey (a, b) 
Instance details

Defined in Data.Aeson.Types.FromJSON

(FromJSON a, FromJSON b, FromJSON c) => FromJSONKey (a, b, c) 
Instance details

Defined in Data.Aeson.Types.FromJSON

FromJSONKey b => FromJSONKey (Tagged a b) 
Instance details

Defined in Data.Aeson.Types.FromJSON

(FromJSON a, FromJSON b, FromJSON c, FromJSON d) => FromJSONKey (a, b, c, d) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

fromJSONKey :: FromJSONKeyFunction (a, b, c, d) #

fromJSONKeyList :: FromJSONKeyFunction [(a, b, c, d)] #

data FromJSONKeyFunction a #

This type is related to ToJSONKeyFunction. If FromJSONKeyValue is used in the FromJSONKey instance, then ToJSONKeyValue should be used in the ToJSONKey instance. The other three data constructors for this type all correspond to ToJSONKeyText. Strictly speaking, FromJSONKeyTextParser is more powerful than FromJSONKeyText, which is in turn more powerful than FromJSONKeyCoerce. For performance reasons, these exist as three options instead of one.

Constructors

FromJSONKeyCoerce !(CoerceText a)

uses coerce (unsafeCoerce in older GHCs)

FromJSONKeyText !(Text -> a)

conversion from Text that always succeeds

FromJSONKeyTextParser !(Text -> Parser a)

conversion from Text that may fail

FromJSONKeyValue !(Value -> Parser a)

conversion for non-textual keys

Instances
Functor FromJSONKeyFunction

Only law abiding up to interpretation

Instance details

Defined in Data.Aeson.Types.FromJSON

class (ConstructorNames f, SumFromString f) => GFromJSONKey (f :: Type -> Type) #

Instances
(ConstructorNames f, SumFromString f) => GFromJSONKey f 
Instance details

Defined in Data.Aeson.Types.FromJSON

class FromJSON1 (f :: Type -> Type) where #

Lifting of the FromJSON class to unary type constructors.

Instead of manually writing your FromJSON1 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 liftParseJSON.

To use the second, simply add a deriving Generic1 clause to your datatype and declare a FromJSON1 instance for your datatype without giving a definition for liftParseJSON.

For example:

{-# LANGUAGE DeriveGeneric #-}

import GHC.Generics

data Pair a b = Pair { pairFst :: a, pairSnd :: b } deriving Generic1

instance FromJSON a => FromJSON1 (Pair a)

If the default implementation doesn't give exactly the results you want, you can customize the generic decoding with only a tiny amount of effort, using genericLiftParseJSON with your preferred Options:

customOptions = defaultOptions
                { fieldLabelModifier = map toUpper
                }

instance FromJSON a => FromJSON1 (Pair a) where
    liftParseJSON = genericLiftParseJSON customOptions

Minimal complete definition

Nothing

Methods

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

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

Instances
FromJSON1 [] 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

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

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

FromJSON1 Maybe 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

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

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

FromJSON1 Last 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

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

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

FromJSON1 Min 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

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

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

FromJSON1 Max 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

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

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

FromJSON1 First 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

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

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

FromJSON1 WrappedMonoid 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

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

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

FromJSON1 Option 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

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

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

FromJSON1 Identity 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

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

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

FromJSON1 First 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

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

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

FromJSON1 Last 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

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

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

FromJSON1 Dual 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

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

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

FromJSON1 NonEmpty 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

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

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

FromJSON1 IntMap 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

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

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

FromJSON1 Tree 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

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

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

FromJSON1 Seq 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

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

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

FromJSON1 DList 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

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

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

FromJSON1 Vector 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

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

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

FromJSON a => FromJSON1 (Either a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

liftParseJSON :: (Value -> Parser a0) -> (Value -> Parser [a0]) -> Value -> Parser (Either a a0) #

liftParseJSONList :: (Value -> Parser a0) -> (Value -> Parser [a0]) -> Value -> Parser [Either a a0] #

FromJSON a => FromJSON1 ((,) a) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

liftParseJSON :: (Value -> Parser a0) -> (Value -> Parser [a0]) -> Value -> Parser (a, a0) #

liftParseJSONList :: (Value -> Parser a0) -> (Value -> Parser [a0]) -> Value -> Parser [(a, a0)] #

(FromJSONKey k, Ord k) => FromJSON1 (Map k) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

liftParseJSON :: (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser (Map k a) #

liftParseJSONList :: (Value -> Parser a) -> (Value -> Parser [a]) -> Value -> Parser [Map k a] #

(FromJSONKey k, Eq k, Hashable k) => FromJSON1 (HashMap k) 
Instance details

Defined in Data.Aeson.Types.FromJSON

Methods

liftParseJSON :: (Value -> Parser a) -> (Value -> Parser [a]) ->