Data.Aeson.Extra.Map

More or less useful newtypes for writing FromJSON & ToJSON instances

Documentation

newtype M a

A wrapper type to parse arbitrary maps

λ > decode "{\"1\": 1, \"2\": 2}" :: Maybe (M (H.HashMap Int Int))
Just (M {getMap = fromList [(1,1),(2,2)]})

Constructors

M

Fields

getMap :: a

Instances

Functor M

Foldable M

Traversable M

Eq a => Eq (M a)

Ord a => Ord (M a)

Read a => Read (M a)

Show a => Show (M a)

ToJSONMap m k v => ToJSON (M m)

FromJSONMap m k v => FromJSON (M m)

class FromJSONKey a where

Methods

parseJSONKey :: Text -> Parser a

Instances

FromJSONKey Int

FromJSONKey Integer

FromJSONKey String

FromJSONKey Text

FromJSONKey Text

parseIntegralJSONKey :: Integral a => Text -> Parser a

class FromJSONMap m k v | m -> k v where

Methods

parseJSONMap :: HashMap Text Value -> Parser m

Instances

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

(Ord k, FromJSONKey k, FromJSON v) => FromJSONMap (Map k v) k v

class ToJSONKey a where

Methods

toJSONKey :: a -> Text

Instances

ToJSONKey Int

ToJSONKey Integer

ToJSONKey String

ToJSONKey Text

ToJSONKey Text

class ToJSONMap m k v | m -> k v where

Methods

toJSONMap :: m -> HashMap Text Value

Instances

(ToJSONKey k, ToJSON v) => ToJSONMap (HashMap k v) k v

(ToJSONKey k, ToJSON v) => ToJSONMap (Map k v) k v