@@ -1,29 +1,27 @@
1−{-# LANGUAGE CPP #-}
2−{-# LANGUAGE DataKinds #-}
3−{-# LANGUAGE DefaultSignatures #-}
4−{-# LANGUAGE FlexibleContexts #-}
5−{-# LANGUAGE FlexibleInstances #-}
6−{-# LANGUAGE GADTs #-}
7−{-# LANGUAGE MultiParamTypeClasses #-}
8−{-# LANGUAGE NamedFieldPuns #-}
9−{-# LANGUAGE OverloadedStrings #-}
10−{-# LANGUAGE PatternGuards #-}
11−{-# LANGUAGE RecordWildCards #-}
12−{-# LANGUAGE ScopedTypeVariables #-}
13−{-# LANGUAGE TypeOperators #-}
14−{-# LANGUAGE TypeSynonymInstances #-}
15−{-# LANGUAGE UndecidableInstances #-}
16−
17−#if __GLASGOW_HASKELL__ >= 706
18−{-# LANGUAGE PolyKinds #-}
19−#endif
1+{-# LANGUAGE CPP #-}
2+{-# LANGUAGE DefaultSignatures #-}
3+{-# LANGUAGE EmptyDataDecls #-}
4+{-# LANGUAGE FlexibleContexts #-}
5+{-# LANGUAGE FlexibleInstances #-}
6+{-# LANGUAGE FunctionalDependencies #-}
7+{-# LANGUAGE GADTs #-}
8+{-# LANGUAGE NoImplicitPrelude #-}
9+{-# LANGUAGE OverloadedStrings #-}
10+{-# LANGUAGE PatternGuards #-}
11+{-# LANGUAGE PolyKinds #-}
12+{-# LANGUAGE RecordWildCards #-}
13+{-# LANGUAGE ScopedTypeVariables #-}
14+{-# LANGUAGE TypeOperators #-}
15+{-# LANGUAGE UndecidableInstances #-}
2016
2117#include "overlapping-compat.h"
18+#include "incoherent-compat.h"
2219
2320-- TODO: Drop this when we remove support for Data.Attoparsec.Number
2421{-# OPTIONS_GHC -fno-warn-deprecations #-}
2522
26−module Data.Aeson.Types.ToJSON (
23+module Data.Aeson.Types.ToJSON
24+ (
2725 -- * Core JSON classes
2826 ToJSON(..)
2927 -- * Liftings to unary and binary type constructors
@@ -35,95 +33,115 @@ module Data.Aeson.Types.ToJSON (
3533 , toEncoding2
3634 -- * Generic JSON classes
3735 , GToJSON(..)
38− , GToEncoding(..)
36+ , ToArgs(..)
3937 , genericToJSON
4038 , genericToEncoding
39+ , genericLiftToJSON
40+ , genericLiftToEncoding
4141 -- * Classes and types for map keys
4242 , ToJSONKey(..)
4343 , ToJSONKeyFunction(..)
44+ , toJSONKeyText
4445 , contramapToJSONKeyFunction
46+
47+ , GToJSONKey()
48+ , genericToJSONKey
49+
4550 -- * Object key-value pairs
4651 , KeyValue(..)
52+ , KeyValuePair(..)
53+ , FromPairs(..)
4754 -- * Functions needed for documentation
4855 -- * Encoding functions
4956 , listEncoding
5057 , listValue
5158 ) where
5259
53−import Prelude ()
5460import Prelude.Compat
5561
56−import Data.Aeson.Encoding.Internal (Encoding (..), Series, dict, emptyArray_,
57− tuple, (>*<))
58−import Data.Aeson.Functions (mapHashKeyVal, mapKeyVal)
59−import Data.Aeson.Types.Generic
62+import Control.Applicative (Const(..))
63+import Control.Monad.ST (ST)
64+import Data.Aeson.Encoding (Encoding, Encoding', Series, dict, emptyArray_)
65+import Data.Aeson.Encoding.Internal ((>*<))
66+import Data.Aeson.Internal.Functions (mapHashKeyVal, mapKeyVal)
67+import Data.Aeson.Types.Generic (AllNullary, False, IsRecord, One, ProductSize, Tagged2(..), True, Zero, productSize)
6068import Data.Aeson.Types.Internal
61−
62−import qualified Data.Aeson.Encode.Builder as EB
63−import qualified Data.Aeson.Encoding.Internal as E
64−
65−import Control.Applicative (Const (..))
66−import Control.Monad.ST (ST)
67−import Data.Attoparsec.Number (Number (..))
68−import Data.Bits (unsafeShiftR)
69−import Data.DList (DList)
70−import Data.Fixed (Fixed, HasResolution)
71−import Data.Foldable (toList)
72−import Data.Functor.Identity (Identity (..))
73−import Data.Int (Int16, Int32, Int64, Int8)
74−import Data.List (intersperse)
75−import Data.List.NonEmpty (NonEmpty (..))
76−import Data.Monoid (Dual (..), First (..), Last (..), (<>))
77−import Data.Proxy (Proxy (..))
78−import Data.Ratio (Ratio, denominator, numerator)
79−import Data.Scientific (Scientific)
80−import Data.Tagged (Tagged (..))
81−import Data.Text (Text, pack)
82−import Data.Time (Day, LocalTime, NominalDiffTime, TimeOfDay,
83− UTCTime, ZonedTime)
84−import Data.Time.Format (FormatTime, formatTime)
85−import Data.Time.Locale.Compat (defaultTimeLocale)
86−import Data.Vector (Vector)
87−import Data.Version (Version, showVersion)
88−import Data.Word (Word16, Word32, Word64, Word8)
89−import Foreign.Storable (Storable)
69+import Data.Attoparsec.Number (Number(..))
70+import Data.Bits (unsafeShiftR)
71+import Data.DList (DList)
72+import Data.Fixed (Fixed, HasResolution, Nano)
73+import Data.Foldable (toList)
74+import Data.Functor.Compose (Compose(..))
75+import Data.Functor.Contravariant (Contravariant (..))
76+import Data.Functor.Identity (Identity(..))
77+import Data.Functor.Product (Product(..))
78+import Data.Functor.Sum (Sum(..))
79+import Data.Int (Int16, Int32, Int64, Int8)
80+import Data.List (intersperse)
81+import Data.List.NonEmpty (NonEmpty(..))
82+import Data.Semigroup ((<>))
83+import Data.Proxy (Proxy(..))
84+import Data.Ratio (Ratio, denominator, numerator)
85+import Data.Scientific (Scientific)
86+import Data.Tagged (Tagged(..))
87+import Data.Text (Text, pack)
88+import Data.Time (Day, DiffTime, LocalTime, NominalDiffTime, TimeOfDay, UTCTime, ZonedTime)
89+import Data.Time.Calendar.Compat (CalendarDiffDays (..), DayOfWeek (..))
90+import Data.Time.LocalTime.Compat (CalendarDiffTime (..))
91+import Data.Time.Clock.System.Compat (SystemTime (..))
92+import Data.Time.Format.Compat (FormatTime, formatTime, defaultTimeLocale)
93+import Data.Vector (Vector)
94+import Data.Version (Version, showVersion)
95+import Data.Void (Void, absurd)
96+import Data.Word (Word16, Word32, Word64, Word8)
97+import Foreign.Storable (Storable)
98+import Foreign.C.Types (CTime (..))
9099import GHC.Generics
91−import Numeric.Natural (Natural)
92−
93−import qualified Data.ByteString.Builder as B
94−import qualified Data.ByteString.Lazy as L
95−import qualified Data.DList as DList
96−import qualified Data.HashMap.Strict as H
97−import qualified Data.HashSet as HashSet
98−import qualified Data.IntMap as IntMap
99−import qualified Data.IntSet as IntSet
100−import qualified Data.List.NonEmpty as NE
101−import qualified Data.Map as M
102−import qualified Data.Scientific as Scientific
103−import qualified Data.Sequence as Seq
104−import qualified Data.Set as Set
105−import qualified Data.Text as T
106−import qualified Data.Text.Encoding as T
107−import qualified Data.Text.Lazy as LT
108−import qualified Data.Text.Lazy.Builder as LTB
109−import qualified Data.Text.Lazy.Builder.Int as LTBI
110−import qualified Data.Tree as Tree
111−import qualified Data.Vector as V
112−import qualified Data.Vector.Generic as VG
113−import qualified Data.Vector.Mutable as VM
114−import qualified Data.Vector.Primitive as VP
115−import qualified Data.Vector.Storable as VS
116−import qualified Data.Vector.Unboxed as VU
117−
118−builder :: ToJSON a => a -> B.Builder
119−builder = fromEncoding . toEncoding
100+import Numeric.Natural (Natural)
101+import qualified Data.Aeson.Encoding as E
102+import qualified Data.Aeson.Encoding.Internal as E (InArray, comma, econcat, retagEncoding)
103+import qualified Data.ByteString.Lazy as L
104+import qualified Data.DList as DList
105+import qualified Data.HashMap.Strict as H
106+import qualified Data.HashSet as HashSet
107+import qualified Data.IntMap as IntMap
108+import qualified Data.IntSet as IntSet
109+import qualified Data.List.NonEmpty as NE
110+import qualified Data.Map as M
111+import qualified Data.Monoid as Monoid
112+import qualified Data.Scientific as Scientific
113+import qualified Data.Semigroup as Semigroup
114+import qualified Data.Sequence as Seq
115+import qualified Data.Set as Set
116+import qualified Data.Text as T
117+import qualified Data.Text.Encoding as T
118+import qualified Data.Text.Lazy as LT
119+import qualified Data.Tree as Tree
120+import qualified Data.UUID.Types as UUID
121+import qualified Data.Vector as V
122+import qualified Data.Vector.Generic as VG
123+import qualified Data.Vector.Mutable as VM
124+import qualified Data.Vector.Primitive as VP
125+import qualified Data.Vector.Storable as VS
126+import qualified Data.Vector.Unboxed as VU
127+
128+import qualified Data.Aeson.Encoding.Builder as EB
129+import qualified Data.ByteString.Builder as B
130+
131+import qualified GHC.Exts as Exts
132+import qualified Data.Primitive.Array as PM
133+import qualified Data.Primitive.SmallArray as PM
134+import qualified Data.Primitive.Types as PM
135+
136+#if MIN_VERSION_primitive(0,6,4)
137+#if !MIN_VERSION_primitive(0,7,0)
138+import qualified Data.Primitive.UnliftedArray as PM
139+#endif
140+import qualified Data.Primitive.PrimArray as PM
141+#endif
120142
121143toJSONPair :: (a -> Value) -> (b -> Value) -> (a, b) -> Value
122−toJSONPair keySerialiser valSerializer (a, b) = Array $ V.create $ do
123− mv <- VM.unsafeNew 2
124− VM.unsafeWrite mv 0 (keySerialiser a)
125− VM.unsafeWrite mv 1 (valSerializer b)
126− return mv
144+toJSONPair a b = liftToJSON2 a (listValue a) b (listValue b)
127145{-# INLINE toJSONPair #-}
128146
129147realFloatToJSON :: RealFloat a => a -> Value
@@ -132,41 +150,59 @@ realFloatToJSON d
132150 | otherwise = Number $ Scientific.fromFloatDigits d
133151{-# INLINE realFloatToJSON #-}
134152
135−realFloatToEncoding :: RealFloat a => a -> Encoding
136−realFloatToEncoding d
137− | isNaN d || isInfinite d = Encoding EB.null_
138− | otherwise = toEncoding (Scientific.fromFloatDigits d)
139−{-# INLINE realFloatToEncoding #-}
140153-------------------------------------------------------------------------------
141154-- Generics
142155-------------------------------------------------------------------------------
143156
144−-- | Class of generic representation types ('Rep') that can be converted to
157+-- | Class of generic representation types that can be converted to
145158-- JSON.
146−class GToJSON f where
159+class GToJSON enc arity f where
147160 -- | This method (applied to 'defaultOptions') is used as the
148− -- default generic implementation of 'toJSON'.
149− gToJSON :: Options -> f a -> Value
150−
151−-- | Class of generic representation types ('Rep') that can be converted to
152−-- a JSON 'Encoding'.
153−class GToEncoding f where
154− -- | This method (applied to 'defaultOptions') can be used as the
155− -- default generic implementation of 'toEncoding'.
156− gToEncoding :: Options -> f a -> Encoding
157−
161+ -- default generic implementation of 'toJSON'
162+ -- (with @enc ~ 'Value'@ and @arity ~ 'Zero'@)
163+ -- and 'liftToJSON' (if the @arity@ is 'One').
164+ --
165+ -- It also provides a generic implementation of 'toEncoding'
166+ -- (with @enc ~ 'Encoding'@ and @arity ~ 'Zero'@)
167+ -- and 'liftToEncoding' (if the @arity@ is 'One').
168+ gToJSON :: Options -> ToArgs enc arity a -> f a -> enc
169+
170+-- | A 'ToArgs' value either stores nothing (for 'ToJSON') or it stores the two
171+-- function arguments that encode occurrences of the type parameter (for
172+-- 'ToJSON1').
173+data ToArgs res arity a where
174+ NoToArgs :: ToArgs res Zero a
175+ To1Args :: (a -> res) -> ([a] -> res) -> ToArgs res One a
158176
159177-- | A configurable generic JSON creator. This function applied to
160178-- 'defaultOptions' is used as the default for 'toJSON' when the type
161179-- is an instance of 'Generic'.
162−genericToJSON :: (Generic a, GToJSON (Rep a)) => Options -> a -> Value
163−genericToJSON opts = gToJSON opts . from
180+genericToJSON :: (Generic a, GToJSON Value Zero (Rep a))
181+ => Options -> a -> Value
182+genericToJSON opts = gToJSON opts NoToArgs . from
183+
184+-- | A configurable generic JSON creator. This function applied to
185+-- 'defaultOptions' is used as the default for 'liftToJSON' when the type
186+-- is an instance of 'Generic1'.
187+genericLiftToJSON :: (Generic1 f, GToJSON Value One (Rep1 f))
188+ => Options -> (a -> Value) -> ([a] -> Value)
189+ -> f a -> Value
190+genericLiftToJSON opts tj tjl = gToJSON opts (To1Args tj tjl) . from1
164191
165192-- | A configurable generic JSON encoder. This function applied to
166193-- 'defaultOptions' is used as the default for 'toEncoding' when the type
167194-- is an instance of 'Generic'.
168−genericToEncoding :: (Generic a, GToEncoding (Rep a)) => Options -> a -> Encoding
169−genericToEncoding opts = gToEncoding opts . from
195+genericToEncoding :: (Generic a, GToJSON Encoding Zero (Rep a))
196+ => Options -> a -> Encoding
197+genericToEncoding opts = gToJSON opts NoToArgs . from
198+
199+-- | A configurable generic JSON encoder. This function applied to
200+-- 'defaultOptions' is used as the default for 'liftToEncoding' when the type
201+-- is an instance of 'Generic1'.
202+genericLiftToEncoding :: (Generic1 f, GToJSON Encoding One (Rep1 f))
203+ => Options -> (a -> Encoding) -> ([a] -> Encoding)
204+ -> f a -> Encoding
205+genericLiftToEncoding opts te tel = gToJSON opts (To1Args te tel) . from1
170206
171207-------------------------------------------------------------------------------
172208-- Class
@@ -174,6 +210,9 @@ genericToEncoding opts = gToEncoding opts . from
174210
175211-- | A type that can be converted to JSON.
176212--
213+-- Instances in general /must/ specify 'toJSON' and /should/ (but don't need
214+-- to) specify 'toEncoding'.
215+--
177216-- An example type and instance:
178217--
179218-- @
@@ -182,10 +221,10 @@ genericToEncoding opts = gToEncoding opts . from
182221--
183222-- data Coord = Coord { x :: Double, y :: Double }
184223--
185−-- instance ToJSON Coord where
186−-- toJSON (Coord x y) = 'object' [\"x\" '.=' x, \"y\" '.=' y]
224+-- instance 'ToJSON' Coord where
225+-- 'toJSON' (Coord x y) = 'object' [\"x\" '.=' x, \"y\" '.=' y]
187226--
188−-- toEncoding (Coord x y) = 'pairs' (\"x\" '.=' x '<>' \"y\" '.=' y)
227+-- 'toEncoding' (Coord x y) = 'pairs' (\"x\" '.=' x '<>' \"y\" '.=' y)
189228-- @
190229--
191230-- Instead of manually writing your 'ToJSON' instance, there are two options
@@ -193,17 +232,15 @@ genericToEncoding opts = gToEncoding opts . from
193232--
194233-- * "Data.Aeson.TH" provides Template Haskell functions which will derive an
195234-- instance at compile time. The generated instance is optimized for your type
196−-- so will probably be more efficient than the following two options:
235+-- so it will probably be more efficient than the following option.
197236--
198237-- * The compiler can provide a default generic implementation for
199238-- 'toJSON'.
200239--
201240-- To use the second, simply add a @deriving 'Generic'@ clause to your
202−-- datatype and declare a 'ToJSON' instance for your datatype without giving
203−-- definitions for 'toJSON' or 'toEncoding'.
204−--
205−-- For example, the previous example can be simplified to a more
206−-- minimal instance:
241+-- datatype and declare a 'ToJSON' instance. If you require nothing other than
242+-- 'defaultOptions', it is sufficient to write (and this is the only
243+-- alternative where the default 'toJSON' implementation is sufficient):
207244--
208245-- @
209246-- {-\# LANGUAGE DeriveGeneric \#-}
@@ -212,35 +249,46 @@ genericToEncoding opts = gToEncoding opts . from
212249--
213250-- data Coord = Coord { x :: Double, y :: Double } deriving 'Generic'
214251--
215−-- instance ToJSON Coord where
216−-- toEncoding = 'genericToEncoding' 'defaultOptions'
252+-- instance 'ToJSON' Coord where
253+-- 'toEncoding' = 'genericToEncoding' 'defaultOptions'
217254-- @
218255--
219−-- Why do we provide an implementation for 'toEncoding' here? The
220−-- 'toEncoding' function is a relatively new addition to this class.
221−-- To allow users of older versions of this library to upgrade without
222−-- having to edit all of their instances or encounter surprising
223−-- incompatibilities, the default implementation of 'toEncoding' uses
224−-- 'toJSON'. This produces correct results, but since it performs an
225−-- intermediate conversion to a 'Value', it will be less efficient
226−-- than directly emitting an 'Encoding'. Our one-liner definition of
227−-- 'toEncoding' above bypasses the intermediate 'Value'.
228−--
229−-- If @DefaultSignatures@ doesn't give exactly the results you want,
230−-- you can customize the generic encoding with only a tiny amount of
231−-- effort, using 'genericToJSON' and 'genericToEncoding' with your
232−-- preferred 'Options':
256+-- If on the other hand you wish to customize the generic decoding, you have
257+-- to implement both methods:
233258--
234259-- @
235−-- instance ToJSON Coord where
236−-- toJSON = 'genericToJSON' 'defaultOptions'
237−-- toEncoding = 'genericToEncoding' 'defaultOptions'
260+-- customOptions = 'defaultOptions'
261+-- { 'fieldLabelModifier' = 'map' 'Data.Char.toUpper'
262+-- }
263+--
264+-- instance 'ToJSON' Coord where
265+-- 'toJSON' = 'genericToJSON' customOptions
266+-- 'toEncoding' = 'genericToEncoding' customOptions
238267-- @
268+--
269+-- Previous versions of this library only had the 'toJSON' method. Adding
270+-- 'toEncoding' had two reasons:
271+--
272+-- 1. toEncoding is more efficient for the common case that the output of
273+-- 'toJSON' is directly serialized to a @ByteString@.
274+-- Further, expressing either method in terms of the other would be
275+-- non-optimal.
276+--
277+-- 2. The choice of defaults allows a smooth transition for existing users:
278+-- Existing instances that do not define 'toEncoding' still
279+-- compile and have the correct semantics. This is ensured by making
280+-- the default implementation of 'toEncoding' use 'toJSON'. This produces
281+-- correct results, but since it performs an intermediate conversion to a
282+-- 'Value', it will be less efficient than directly emitting an 'Encoding'.
283+-- (this also means that specifying nothing more than
284+-- @instance ToJSON Coord@ would be sufficient as a generically decoding
285+-- instance, but there probably exists no good reason to not specify
286+-- 'toEncoding' in new instances.)
239287class ToJSON a where
240288 -- | Convert a Haskell value to a JSON-friendly intermediate type.
241289 toJSON :: a -> Value
242290
243− default toJSON :: (Generic a, GToJSON (Rep a)) => a -> Value
291+ default toJSON :: (Generic a, GToJSON Value Zero (Rep a)) => a -> Value
244292 toJSON = genericToJSON defaultOptions
245293
246294 -- | Encode a Haskell value as JSON.
@@ -257,12 +305,12 @@ class ToJSON a where
257305 -- extension, and then have GHC generate a method body as follows.
258306 --
259307 -- @
260− -- instance ToJSON Coord where
261− -- toEncoding = 'genericToEncoding' 'defaultOptions'
308+ -- instance 'ToJSON' Coord where
309+ -- 'toEncoding' = 'genericToEncoding' 'defaultOptions'
262310 -- @
263311
264312 toEncoding :: a -> Encoding
265− toEncoding = E.Encoding . EB.encodeToBuilder . toJSON
313+ toEncoding = E.value . toJSON
266314 {-# INLINE toEncoding #-}
267315
268316 toJSONList :: [a] -> Value
@@ -283,46 +331,280 @@ class KeyValue kv where
283331 infixr 8 .=
284332
285333instance KeyValue Series where
286− name .= value = E.Value $ E.text name <> E.colon <> toEncoding value
334+ name .= value = E.pair name (toEncoding value)
287335 {-# INLINE (.=) #-}
288336
289337instance KeyValue Pair where
290338 name .= value = (name, toJSON value)
291339 {-# INLINE (.=) #-}
292340
341+-- | Constructs a singleton 'H.HashMap'. For calling functions that
342+-- demand an 'Object' for constructing objects. To be used in
343+-- conjunction with 'mconcat'. Prefer to use 'object' where possible.
344+instance KeyValue Object where
345+ name .= value = H.singleton name (toJSON value)
346+ {-# INLINE (.=) #-}
347+
293348-------------------------------------------------------------------------------
294349-- Classes and types for map keys
295350-------------------------------------------------------------------------------
296351
352+-- | Typeclass for types that can be used as the key of a map-like container
353+-- (like 'Map' or 'HashMap'). For example, since 'Text' has a 'ToJSONKey'
354+-- instance and 'Char' has a 'ToJSON' instance, we can encode a value of
355+-- type 'Map' 'Text' 'Char':
356+--
357+-- >>> LBC8.putStrLn $ encode $ Map.fromList [("foo" :: Text, 'a')]
358+-- {"foo":"a"}
359+--
360+-- Since 'Int' also has a 'ToJSONKey' instance, we can similarly write:
361+--
362+-- >>> LBC8.putStrLn $ encode $ Map.fromList [(5 :: Int, 'a')]
363+-- {"5":"a"}
364+--
365+-- JSON documents only accept strings as object keys. For any type
366+-- from @base@ that has a natural textual representation, it can be
367+-- expected that its 'ToJSONKey' instance will choose that representation.
368+--
369+-- For data types that lack a natural textual representation, an alternative
370+-- is provided. The map-like container is represented as a JSON array
371+-- instead of a JSON object. Each value in the array is an array with
372+-- exactly two values. The first is the key and the second is the value.
373+--
374+-- For example, values of type '[Text]' cannot be encoded to a
375+-- string, so a 'Map' with keys of type '[Text]' is encoded as follows:
376+--
377+-- >>> LBC8.putStrLn $ encode $ Map.fromList [(["foo","bar","baz" :: Text], 'a')]
378+-- [[["foo","bar","baz"],"a"]]
379+--
380+-- The default implementation of 'ToJSONKey' chooses this method of
381+-- encoding a key, using the 'ToJSON' instance of the type.
382+--
383+-- To use your own data type as the key in a map, all that is needed
384+-- is to write a 'ToJSONKey' (and possibly a 'FromJSONKey') instance
385+-- for it. If the type cannot be trivially converted to and from 'Text',
386+-- it is recommended that 'ToJSONKeyValue' is used. Since the default
387+-- implementations of the typeclass methods can build this from a
388+-- 'ToJSON' instance, there is nothing that needs to be written:
389+--
390+-- > data Foo = Foo { fooAge :: Int, fooName :: Text }
391+-- > deriving (Eq,Ord,Generic)
392+-- > instance ToJSON Foo
393+-- > instance ToJSONKey Foo
394+--
395+-- That's it. We can now write:
396+--
397+-- >>> let m = Map.fromList [(Foo 4 "bar",'a'),(Foo 6 "arg",'b')]
398+-- >>> LBC8.putStrLn $ encode m
399+-- [[{"fooName":"bar","fooAge":4},"a"],[{"fooName":"arg","fooAge":6},"b"]]
400+--
401+-- The next case to consider is if we have a type that is a
402+-- newtype wrapper around 'Text'. The recommended approach is to use
403+-- generalized newtype deriving:
404+--
405+-- > newtype RecordId = RecordId { getRecordId :: Text }
406+-- > deriving (Eq,Ord,ToJSONKey)
407+--
408+-- Then we may write:
409+--
410+-- >>> LBC8.putStrLn $ encode $ Map.fromList [(RecordId "abc",'a')]
411+-- {"abc":"a"}
412+--
413+-- Simple sum types are a final case worth considering. Suppose we have:
414+--
415+-- > data Color = Red | Green | Blue
416+-- > deriving (Show,Read,Eq,Ord)
417+--
418+-- It is possible to get the 'ToJSONKey' instance for free as we did
419+-- with 'Foo'. However, in this case, we have a natural way to go to
420+-- and from 'Text' that does not require any escape sequences. So
421+-- 'ToJSONKeyText' can be used instead of 'ToJSONKeyValue' to encode maps
422+-- as objects instead of arrays of pairs. This instance may be
423+-- implemented using generics as follows:
424+--
425+-- @
426+-- instance 'ToJSONKey' Color where
427+-- 'toJSONKey' = 'genericToJSONKey' 'defaultJSONKeyOptions'
428+-- @
429+--
430+-- === __Low-level implementations__
431+--
432+-- The 'Show' instance can be used to help write 'ToJSONKey':
433+--
434+-- > instance ToJSONKey Color where
435+-- > toJSONKey = ToJSONKeyText f g
436+-- > where f = Text.pack . show
437+-- > g = text . Text.pack . show
438+-- > -- text function is from Data.Aeson.Encoding
439+--
440+-- The situation of needing to turning function @a -> Text@ into
441+-- a 'ToJSONKeyFunction' is common enough that a special combinator
442+-- is provided for it. The above instance can be rewritten as:
443+--
444+-- > instance ToJSONKey Color where
445+-- > toJSONKey = toJSONKeyText (Text.pack . show)
446+--
447+-- The performance of the above instance can be improved by
448+-- not using 'String' as an intermediate step when converting to
449+-- 'Text'. One option for improving performance would be to use
450+-- template haskell machinery from the @text-show@ package. However,
451+-- even with the approach, the 'Encoding' (a wrapper around a bytestring
452+-- builder) is generated by encoding the 'Text' to a 'ByteString',
453+-- an intermediate step that could be avoided. The fastest possible
454+-- implementation would be:
455+--
456+-- > -- Assuming that OverloadedStrings is enabled
457+-- > instance ToJSONKey Color where
458+-- > toJSONKey = ToJSONKeyText f g
459+-- > where f x = case x of {Red -> "Red";Green ->"Green";Blue -> "Blue"}
460+-- > g x = case x of {Red -> text "Red";Green -> text "Green";Blue -> text "Blue"}
461+-- > -- text function is from Data.Aeson.Encoding
462+--
463+-- This works because GHC can lift the encoded values out of the case
464+-- statements, which means that they are only evaluated once. This
465+-- approach should only be used when there is a serious need to
466+-- maximize performance.
467+
297468class ToJSONKey a where
469+ -- | Strategy for rendering the key for a map-like container.
298470 toJSONKey :: ToJSONKeyFunction a
299471 default toJSONKey :: ToJSON a => ToJSONKeyFunction a
300− toJSONKey = ToJSONKeyValue (toJSON, toEncoding)
472+ toJSONKey = ToJSONKeyValue toJSON toEncoding
473+
474+ -- | This is similar in spirit to the 'showsList' method of 'Show'.
475+ -- It makes it possible to give 'String' keys special treatment
476+ -- without using @OverlappingInstances@. End users should always
477+ -- be able to use the default implementation of this method.
301478 toJSONKeyList :: ToJSONKeyFunction [a]
302479 default toJSONKeyList :: ToJSON a => ToJSONKeyFunction [a]
303− toJSONKeyList = ToJSONKeyValue (toJSON, toEncoding)
480+ toJSONKeyList = ToJSONKeyValue toJSON toEncoding
304481
305482data ToJSONKeyFunction a
306− = ToJSONKeyText (a -> Text, a -> Encoding)
307− | ToJSONKeyValue (a -> Value, a -> Encoding)
483+ = ToJSONKeyText !(a -> Text) !(a -> Encoding' Text)
484+ -- ^ key is encoded to string, produces object
485+ | ToJSONKeyValue !(a -> Value) !(a -> Encoding)
486+ -- ^ key is encoded to value, produces array
308487
488+-- | Helper for creating textual keys.
489+--
490+-- @
491+-- instance 'ToJSONKey' MyKey where
492+-- 'toJSONKey' = 'toJSONKeyText' myKeyToText
493+-- where
494+-- myKeyToText = Text.pack . show -- or showt from text-show
495+-- @
496+toJSONKeyText :: (a -> Text) -> ToJSONKeyFunction a
497+toJSONKeyText f = ToJSONKeyText f (E.text . f)
498+
499+-- | TODO: should this be exported?
500+toJSONKeyTextEnc :: (a -> Encoding' Text) -> ToJSONKeyFunction a
501+toJSONKeyTextEnc e = ToJSONKeyText tot e
502+ where
503+ -- TODO: dropAround is also used in stringEncoding, which is unfortunate atm
504+ tot = T.dropAround (== '"')
505+ . T.decodeLatin1
506+ . L.toStrict
507+ . E.encodingToLazyByteString
508+ . e
509+
510+instance Contravariant ToJSONKeyFunction where
511+ contramap = contramapToJSONKeyFunction
512+
513+-- | Contravariant map, as 'ToJSONKeyFunction' is a contravariant functor.
309514contramapToJSONKeyFunction :: (b -> a) -> ToJSONKeyFunction a -> ToJSONKeyFunction b
310515contramapToJSONKeyFunction h x = case x of
311− ToJSONKeyText (f,g) -> ToJSONKeyText (f . h, g . h)
312− ToJSONKeyValue (f,g) -> ToJSONKeyValue (f . h, g . h)
516+ ToJSONKeyText f g -> ToJSONKeyText (f . h) (g . h)
517+ ToJSONKeyValue f g -> ToJSONKeyValue (f . h) (g . h)
518+
519+-- 'toJSONKey' for 'Generic' types.
520+-- Deriving is supported for enumeration types, i.e. the sums of nullary
521+-- constructors. The names of constructors will be used as keys for JSON
522+-- objects.
523+--
524+-- See also 'genericFromJSONKey'.
525+--
526+-- === __Example__
527+--
528+-- @
529+-- data Color = Red | Green | Blue
530+-- deriving 'Generic'
531+--
532+-- instance 'ToJSONKey' Color where
533+-- 'toJSONKey' = 'genericToJSONKey' 'defaultJSONKeyOptions'
534+-- @
535+genericToJSONKey :: (Generic a, GToJSONKey (Rep a))
536+ => JSONKeyOptions -> ToJSONKeyFunction a
537+genericToJSONKey opts = toJSONKeyText (pack . keyModifier opts . getConName . from)
538+
539+class GetConName f => GToJSONKey f
540+instance GetConName f => GToJSONKey f
313541
314542-------------------------------------------------------------------------------
315543-- Lifings of FromJSON and ToJSON to unary and binary type constructors
316544-------------------------------------------------------------------------------
317545
546+
318547-- | Lifting of the 'ToJSON' class to unary type constructors.
548+--
549+-- Instead of manually writing your 'ToJSON1' instance, there are two options
550+-- to do it automatically:
551+--
552+-- * "Data.Aeson.TH" provides Template Haskell functions which will derive an
553+-- instance at compile time. The generated instance is optimized for your type
554+-- so it will probably be more efficient than the following option.
555+--
556+-- * The compiler can provide a default generic implementation for
557+-- 'toJSON1'.
558+--
559+-- To use the second, simply add a @deriving 'Generic1'@ clause to your
560+-- datatype and declare a 'ToJSON1' instance for your datatype without giving
561+-- definitions for 'liftToJSON' or 'liftToEncoding'.
562+--
563+-- For example:
564+--
565+-- @
566+-- {-\# LANGUAGE DeriveGeneric \#-}
567+--
568+-- import "GHC.Generics"
569+--
570+-- data Pair = Pair { pairFst :: a, pairSnd :: b } deriving 'Generic1'
571+--
572+-- instance 'ToJSON' a => 'ToJSON1' (Pair a)
573+-- @
574+--
575+-- If the default implementation doesn't give exactly the results you want,
576+-- you can customize the generic encoding with only a tiny amount of
577+-- effort, using 'genericLiftToJSON' and 'genericLiftToEncoding' with
578+-- your preferred 'Options':
579+--
580+-- @
581+-- customOptions = 'defaultOptions'
582+-- { 'fieldLabelModifier' = 'map' 'Data.Char.toUpper'
583+-- }
584+--
585+-- instance 'ToJSON' a => 'ToJSON1' (Pair a) where
586+-- 'liftToJSON' = 'genericLiftToJSON' customOptions
587+-- 'liftToEncoding' = 'genericLiftToEncoding' customOptions
588+-- @
589+--
590+-- See also 'ToJSON'.
319591class ToJSON1 f where
320592 liftToJSON :: (a -> Value) -> ([a] -> Value) -> f a -> Value
593+
594+ default liftToJSON :: (Generic1 f, GToJSON Value One (Rep1 f))
595+ => (a -> Value) -> ([a] -> Value) -> f a -> Value
596+ liftToJSON = genericLiftToJSON defaultOptions
597+
321598 liftToJSONList :: (a -> Value) -> ([a] -> Value) -> [f a] -> Value
322599 liftToJSONList f g = listValue (liftToJSON f g)
323600
324− -- | Unfortunately there cannot be a default implementation of 'liftToEncoding'.
325601 liftToEncoding :: (a -> Encoding) -> ([a] -> Encoding) -> f a -> Encoding
602+
603+ default liftToEncoding :: (Generic1 f, GToJSON Encoding One (Rep1 f))
604+ => (a -> Encoding) -> ([a] -> Encoding)
605+ -> f a -> Encoding
606+ liftToEncoding = genericLiftToEncoding defaultOptions
607+
326608 liftToEncodingList :: (a -> Encoding) -> ([a] -> Encoding) -> [f a] -> Encoding
327609 liftToEncodingList f g = listEncoding (liftToEncoding f g)
328610
@@ -336,8 +618,13 @@ toEncoding1 :: (ToJSON1 f, ToJSON a) => f a -> Encoding
336618toEncoding1 = liftToEncoding toEncoding toEncodingList
337619{-# INLINE toEncoding1 #-}
338620
339−
340621-- | Lifting of the 'ToJSON' class to binary type constructors.
622+--
623+-- Instead of manually writing your 'ToJSON2' instance, "Data.Aeson.TH"
624+-- provides Template Haskell functions which will derive an instance at compile time.
625+--
626+-- The compiler cannot provide a default generic implementation for 'liftToJSON2',
627+-- unlike 'toJSON' and 'liftToJSON'.
341628class ToJSON2 f where
342629 liftToJSON2 :: (a -> Value) -> ([a] -> Value) -> (b -> Value) -> ([b] -> Value) -> f a b -> Value
343630 liftToJSONList2 :: (a -> Value) -> ([a] -> Value) -> (b -> Value) -> ([b] -> Value) -> [f a b] -> Value
@@ -361,9 +648,25 @@ toEncoding2 = liftToEncoding2 toEncoding toEncodingList toEncoding toEncodingLis
361648-- Encoding functions
362649-------------------------------------------------------------------------------
363650
651+-- | Helper function to use with 'liftToEncoding'.
652+-- Useful when writing own 'ToJSON1' instances.
653+--
654+-- @
655+-- newtype F a = F [a]
656+--
657+-- -- This instance encodes 'String' as an array of chars
658+-- instance 'ToJSON1' F where
659+-- 'liftToJSON' tj _ (F xs) = 'liftToJSON' tj ('listValue' tj) xs
660+-- 'liftToEncoding' te _ (F xs) = 'liftToEncoding' te ('listEncoding' te) xs
661+--
662+-- instance 'Data.Aeson.FromJSON.FromJSON1' F where
663+-- 'Data.Aeson.FromJSON.liftParseJSON' p _ v = F \<$\> 'Data.Aeson.FromJSON.liftParseJSON' p ('Data.Aeson.FromJSON.listParser' p) v
664+-- @
364665listEncoding :: (a -> Encoding) -> [a] -> Encoding
365666listEncoding = E.list
667+{-# INLINE listEncoding #-}
366668
669+-- | Helper function to use with 'liftToJSON', see 'listEncoding'.
367670listValue :: (a -> Value) -> [a] -> Value
368671listValue f = Array . V.fromList . map f
369672{-# INLINE listValue #-}
@@ -382,6 +685,11 @@ instance ToJSON1 [] where
382685 {-# INLINE liftToEncoding #-}
383686
384687instance (ToJSON a) => ToJSON [a] where
688+ {-# SPECIALIZE instance ToJSON String #-}
689+ {-# SPECIALIZE instance ToJSON [String] #-}
690+ {-# SPECIALIZE instance ToJSON [Array] #-}
691+ {-# SPECIALIZE instance ToJSON [Object] #-}
692+
385693 toJSON = toJSON1
386694 {-# INLINE toJSON #-}
387695
@@ -392,214 +700,260 @@ instance (ToJSON a) => ToJSON [a] where
392700-- Generic toJSON / toEncoding
393701-------------------------------------------------------------------------------
394702
703+instance OVERLAPPABLE_ (GToJSON enc arity a) => GToJSON enc arity (M1 i c a) where
704+ -- Meta-information, which is not handled elsewhere, is ignored:
705+ gToJSON opts targs = gToJSON opts targs . unM1
706+ {-# INLINE gToJSON #-}
707+
708+instance GToJSON enc One Par1 where
709+ -- Direct occurrences of the last type parameter are encoded with the
710+ -- function passed in as an argument:
711+ gToJSON _opts (To1Args tj _) = tj . unPar1
712+ {-# INLINE gToJSON #-}
713+
714+instance ( ConsToJSON enc arity a
715+ , AllNullary (C1 c a) allNullary
716+ , SumToJSON enc arity (C1 c a) allNullary
717+ ) => GToJSON enc arity (D1 d (C1 c a)) where
718+ -- The option 'tagSingleConstructors' determines whether to wrap
719+ -- a single-constructor type.
720+ gToJSON opts targs
721+ | tagSingleConstructors opts = (unTagged :: Tagged allNullary enc -> enc)
722+ . sumToJSON opts targs
723+ . unM1
724+ | otherwise = consToJSON opts targs . unM1 . unM1
725+ {-# INLINE gToJSON #-}
726+
727+instance (ConsToJSON enc arity a) => GToJSON enc arity (C1 c a) where
728+ -- Constructors need to be encoded differently depending on whether they're
729+ -- a record or not. This distinction is made by 'consToJSON':
730+ gToJSON opts targs = consToJSON opts targs . unM1
731+ {-# INLINE gToJSON #-}
732+
733+instance ( AllNullary (a :+: b) allNullary
734+ , SumToJSON enc arity (a :+: b) allNullary
735+ ) => GToJSON enc arity (a :+: b)
736+ where
737+ -- If all constructors of a sum datatype are nullary and the
738+ -- 'allNullaryToStringTag' option is set they are encoded to
739+ -- strings. This distinction is made by 'sumToJSON':
740+ gToJSON opts targs = (unTagged :: Tagged allNullary enc -> enc)
741+ . sumToJSON opts targs
742+ {-# INLINE gToJSON #-}
743+
395744--------------------------------------------------------------------------------
396745-- Generic toJSON
397746
398−instance OVERLAPPABLE_ (GToJSON a) => GToJSON (M1 i c a) where
399− -- Meta-information, which is not handled elsewhere, is ignored:
400− gToJSON opts = gToJSON opts . unM1
747+-- Note: Refactoring 'ToJSON a' to 'ToJSON enc a' (and 'ToJSON1' similarly) is
748+-- possible but makes error messages a bit harder to understand for missing
749+-- instances.
750+
751+instance GToJSON Value arity V1 where
752+ -- Empty values do not exist, which makes the job of formatting them
753+ -- rather easy:
754+ gToJSON _ _ x = x `seq` error "case: V1"
755+ {-# INLINE gToJSON #-}
401756
402−instance (ToJSON a) => GToJSON (K1 i a) where
757+instance ToJSON a => GToJSON Value arity (K1 i a) where
403758 -- Constant values are encoded using their ToJSON instance:
404− gToJSON _opts = toJSON . unK1
759+ gToJSON _opts _ = toJSON . unK1
760+ {-# INLINE gToJSON #-}
405761
406−instance GToJSON U1 where
407− -- Empty constructors are encoded to an empty array:
408− gToJSON _opts _ = emptyArray
762+instance ToJSON1 f => GToJSON Value One (Rec1 f) where
763+ -- Recursive occurrences of the last type parameter are encoded using their
764+ -- ToJSON1 instance:
765+ gToJSON _opts (To1Args tj tjl) = liftToJSON tj tjl . unRec1
766+ {-# INLINE gToJSON #-}
409767
410−instance (ConsToJSON a) => GToJSON (C1 c a) where
411− -- Constructors need to be encoded differently depending on whether they're
412− -- a record or not. This distinction is made by 'consToJSON':
413− gToJSON opts = consToJSON opts . unM1
768+instance GToJSON Value arity U1 where
769+ -- Empty constructors are encoded to an empty array:
770+ gToJSON _opts _ _ = emptyArray
771+ {-# INLINE gToJSON #-}
414772
415−instance ( WriteProduct a, WriteProduct b
416− , ProductSize a, ProductSize b ) => GToJSON (a :*: b) where
773+instance ( WriteProduct arity a, WriteProduct arity b
774+ , ProductSize a, ProductSize b
775+ ) => GToJSON Value arity (a :*: b)
776+ where
417777 -- Products are encoded to an array. Here we allocate a mutable vector of
418778 -- the same size as the product and write the product's elements to it using
419779 -- 'writeProduct':
420− gToJSON opts p =
780+ gToJSON opts targs p =
421781 Array $ V.create $ do
422782 mv <- VM.unsafeNew lenProduct
423− writeProduct opts mv 0 lenProduct p
783+ writeProduct opts targs mv 0 lenProduct p
424784 return mv
425785 where
426786 lenProduct = (unTagged2 :: Tagged2 (a :*: b) Int -> Int)
427787 productSize
428−
429−instance ( AllNullary (a :+: b) allNullary
430− , SumToJSON (a :+: b) allNullary ) => GToJSON (a :+: b) where
431− -- If all constructors of a sum datatype are nullary and the
432− -- 'allNullaryToStringTag' option is set they are encoded to
433− -- strings. This distinction is made by 'sumToJSON':
434− gToJSON opts = (unTagged :: Tagged allNullary Value -> Value)
435− . sumToJSON opts
788+ {-# INLINE gToJSON #-}
789+
790+instance ( ToJSON1 f
791+ , GToJSON Value One g
792+ ) => GToJSON Value One (f :.: g)
793+ where
794+ -- If an occurrence of the last type parameter is nested inside two
795+ -- composed types, it is encoded by using the outermost type's ToJSON1
796+ -- instance to generically encode the innermost type:
797+ gToJSON opts targs =
798+ let gtj = gToJSON opts targs in
799+ liftToJSON gtj (listValue gtj) . unComp1
800+ {-# INLINE gToJSON #-}
436801
437802--------------------------------------------------------------------------------
438803-- Generic toEncoding
439804
440−instance OVERLAPPABLE_ (GToEncoding a) => GToEncoding (M1 i c a) where
441− -- Meta-information, which is not handled elsewhere, is ignored:
442− gToEncoding opts = gToEncoding opts . unM1
443−
444−instance (ToJSON a) => GToEncoding (K1 i a) where
805+instance ToJSON a => GToJSON Encoding arity (K1 i a) where
445806 -- Constant values are encoded using their ToJSON instance:
446− gToEncoding _opts = toEncoding . unK1
807+ gToJSON _opts _ = toEncoding . unK1
808+ {-# INLINE gToJSON #-}
447809
448−instance GToEncoding U1 where
449− -- Empty constructors are encoded to an empty array:
450− gToEncoding _opts _ = E.emptyArray_
810+instance ToJSON1 f => GToJSON Encoding One (Rec1 f) where
811+ -- Recursive occurrences of the last type parameter are encoded using their
812+ -- ToEncoding1 instance:
813+ gToJSON _opts (To1Args te tel) = liftToEncoding te tel . unRec1
814+ {-# INLINE gToJSON #-}
451815
452−instance (ConsToEncoding a) => GToEncoding (C1 c a) where
453− -- Constructors need to be encoded differently depending on whether they're
454− -- a record or not. This distinction is made by 'consToEncoding':
455− gToEncoding opts = consToEncoding opts . unM1
816+instance GToJSON Encoding arity U1 where
817+ -- Empty constructors are encoded to an empty array:
818+ gToJSON _opts _ _ = E.emptyArray_
819+ {-# INLINE gToJSON #-}
456820
457−instance ( EncodeProduct a, EncodeProduct b ) => GToEncoding (a :*: b) where
821+instance ( EncodeProduct arity a
822+ , EncodeProduct arity b
823+ ) => GToJSON Encoding arity (a :*: b)
824+ where
458825 -- Products are encoded to an array. Here we allocate a mutable vector of
459826 -- the same size as the product and write the product's elements to it using
460827 -- 'encodeProduct':
461− gToEncoding opts p = E.tuple $ encodeProduct opts p
462−
463−instance ( AllNullary (a :+: b) allNullary
464− , SumToEncoding (a :+: b) allNullary ) => GToEncoding (a :+: b) where
465− -- If all constructors of a sum datatype are nullary and the
466− -- 'allNullaryToStringTag' option is set they are encoded to
467− -- strings. This distinction is made by 'sumToEncoding':
468− gToEncoding opts
469− = (unTagged :: Tagged allNullary Encoding -> Encoding)
470− . sumToEncoding opts
828+ gToJSON opts targs p = E.list E.retagEncoding [encodeProduct opts targs p]
829+ {-# INLINE gToJSON #-}
830+
831+instance ( ToJSON1 f
832+ , GToJSON Encoding One g
833+ ) => GToJSON Encoding One (f :.: g)
834+ where
835+ -- If an occurrence of the last type parameter is nested inside two
836+ -- composed types, it is encoded by using the outermost type's ToJSON1
837+ -- instance to generically encode the innermost type:
838+ gToJSON opts targs =
839+ let gte = gToJSON opts targs in
840+ liftToEncoding gte (listEncoding gte) . unComp1
841+ {-# INLINE gToJSON #-}
471842
472843--------------------------------------------------------------------------------
473844
474−class SumToJSON f allNullary where
475− sumToJSON :: Options -> f a -> Tagged allNullary Value
476−
477−instance ( GetConName f
478− , TaggedObjectPairs f
479− , ObjectWithSingleFieldObj f
480− , TwoElemArrayObj f ) => SumToJSON f True where
481− sumToJSON opts
482− | allNullaryToStringTag opts = Tagged . String . pack
845+class SumToJSON enc arity f allNullary where
846+ sumToJSON :: Options -> ToArgs enc arity a
847+ -> f a -> Tagged allNullary enc
848+
849+instance ( GetConName f
850+ , FromString enc
851+ , TaggedObject enc arity f
852+ , SumToJSON' ObjectWithSingleField enc arity f
853+ , SumToJSON' TwoElemArray enc arity f
854+ , SumToJSON' UntaggedValue enc arity f
855+ ) => SumToJSON enc arity f True
856+ where
857+ sumToJSON opts targs
858+ | allNullaryToStringTag opts = Tagged . fromString
483859 . constructorTagModifier opts . getConName
484− | otherwise = Tagged . nonAllNullarySumToJSON opts
485−
486−instance ( TwoElemArrayObj f
487− , TaggedObjectPairs f
488− , ObjectWithSingleFieldObj f ) => SumToJSON f False where
489− sumToJSON opts = Tagged . nonAllNullarySumToJSON opts
490−
491−nonAllNullarySumToJSON :: ( TwoElemArrayObj f
492− , TaggedObjectPairs f
493− , ObjectWithSingleFieldObj f
494− ) => Options -> f a -> Value
495−nonAllNullarySumToJSON opts =
860+ | otherwise = Tagged . nonAllNullarySumToJSON opts targs
861+
862+instance ( TaggedObject enc arity f
863+ , SumToJSON' ObjectWithSingleField enc arity f
864+ , SumToJSON' TwoElemArray enc arity f
865+ , SumToJSON' UntaggedValue enc arity f
866+ ) => SumToJSON enc arity f False
867+ where
868+ sumToJSON opts targs = Tagged . nonAllNullarySumToJSON opts targs
869+
870+nonAllNullarySumToJSON :: ( TaggedObject enc arity f
871+ , SumToJSON' ObjectWithSingleField enc arity f
872+ , SumToJSON' TwoElemArray enc arity f
873+ , SumToJSON' UntaggedValue enc arity f
874+ ) => Options -> ToArgs enc arity a
875+ -> f a -> enc
876+nonAllNullarySumToJSON opts targs =
496877 case sumEncoding opts of
497− TaggedObject{..} ->
498− object . taggedObjectPairs opts tagFieldName contentsFieldName
499− ObjectWithSingleField -> Object . objectWithSingleFieldObj opts
500− TwoElemArray -> Array . twoElemArrayObj opts
501−
502−--------------------------------------------------------------------------------
503878
504−class SumToEncoding f allNullary where
505− sumToEncoding :: Options -> f a -> Tagged allNullary Encoding
506−
507−instance ( GetConName f
508− , TaggedObjectEnc f
509− , ObjectWithSingleFieldEnc f
510− , TwoElemArrayEnc f ) => SumToEncoding f True where
511− sumToEncoding opts
512− | allNullaryToStringTag opts = Tagged . toEncoding .
513− constructorTagModifier opts . getConName
514− | otherwise = Tagged . nonAllNullarySumToEncoding opts
515−
516−instance ( TwoElemArrayEnc f
517− , TaggedObjectEnc f
518− , ObjectWithSingleFieldEnc f ) => SumToEncoding f False where
519− sumToEncoding opts = Tagged . nonAllNullarySumToEncoding opts
520−
521−nonAllNullarySumToEncoding :: ( TwoElemArrayEnc f
522− , TaggedObjectEnc f
523− , ObjectWithSingleFieldEnc f
524− ) => Options -> f a -> Encoding
525−nonAllNullarySumToEncoding opts =
526− case sumEncoding opts of
527879 TaggedObject{..} ->
528− taggedObjectEnc opts tagFieldName contentsFieldName
529− ObjectWithSingleField -> objectWithSingleFieldEnc opts
530− TwoElemArray -> twoElemArrayEnc opts
531−
532−--------------------------------------------------------------------------------
880+ taggedObject opts targs tagFieldName contentsFieldName
533881
534−class TaggedObjectPairs f where
535− taggedObjectPairs :: Options -> String -> String -> f a -> [Pair]
882+ ObjectWithSingleField ->
883+ (unTagged :: Tagged ObjectWithSingleField enc -> enc)
884+ . sumToJSON' opts targs
536885
537−instance ( TaggedObjectPairs a
538− , TaggedObjectPairs b ) => TaggedObjectPairs (a :+: b) where
539− taggedObjectPairs opts tagFieldName contentsFieldName (L1 x) =
540− taggedObjectPairs opts tagFieldName contentsFieldName x
541− taggedObjectPairs opts tagFieldName contentsFieldName (R1 x) =
542− taggedObjectPairs opts tagFieldName contentsFieldName x
886+ TwoElemArray ->
887+ (unTagged :: Tagged TwoElemArray enc -> enc)
888+ . sumToJSON' opts targs
543889
544−instance ( IsRecord a isRecord
545− , TaggedObjectPairs' a isRecord
546− , Constructor c ) => TaggedObjectPairs (C1 c a) where
547− taggedObjectPairs opts tagFieldName contentsFieldName =
548− (pack tagFieldName .= constructorTagModifier opts
549− (conName (undefined :: t c a p)) :) .
550− (unTagged :: Tagged isRecord [Pair] -> [Pair]) .
551− taggedObjectPairs' opts contentsFieldName . unM1
890+ UntaggedValue ->
891+ (unTagged :: Tagged UntaggedValue enc -> enc)
892+ . sumToJSON' opts targs
552893
553−class TaggedObjectPairs' f isRecord where
554− taggedObjectPairs' :: Options -> String -> f a -> Tagged isRecord [Pair]
894+--------------------------------------------------------------------------------
555895
556−instance OVERLAPPING_ TaggedObjectPairs' U1 False where
557− taggedObjectPairs' _ _ _ = Tagged []
896+class FromString enc where
897+ fromString :: String -> enc
558898
559−instance (RecordToPairs f) => TaggedObjectPairs' f True where
560− taggedObjectPairs' opts _ = Tagged . toList . recordToPairs opts
899+instance FromString Encoding where
900+ fromString = toEncoding
561901
562−instance (GToJSON f) => TaggedObjectPairs' f False where
563− taggedObjectPairs' opts contentsFieldName =
564− Tagged . (:[]) . (pack contentsFieldName .=) . gToJSON opts
902+instance FromString Value where
903+ fromString = String . pack
565904
566905--------------------------------------------------------------------------------
567906
568−class TaggedObjectEnc f where
569− taggedObjectEnc :: Options -> String -> String -> f a -> Encoding
570−
571−instance ( TaggedObjectEnc a
572− , TaggedObjectEnc b ) => TaggedObjectEnc (a :+: b) where
573− taggedObjectEnc opts tagFieldName contentsFieldName (L1 x) =
574− taggedObjectEnc opts tagFieldName contentsFieldName x
575− taggedObjectEnc opts tagFieldName contentsFieldName (R1 x) =
576− taggedObjectEnc opts tagFieldName contentsFieldName x
577−
578−instance ( IsRecord a isRecord
579− , TaggedObjectEnc' a isRecord
580− , Constructor c ) => TaggedObjectEnc (C1 c a) where
581− taggedObjectEnc opts tagFieldName contentsFieldName v =
582− E.openCurly <>
583− (toEncoding tagFieldName <>
584− E.colon <>
585− toEncoding (constructorTagModifier opts (conName (undefined :: t c a p)))) <>
586− ((unTagged :: Tagged isRecord Encoding -> Encoding) .
587− taggedObjectEnc' opts contentsFieldName . unM1 $ v) <>
588− E.closeCurly
589−
590−class TaggedObjectEnc' f isRecord where
591− taggedObjectEnc' :: Options -> String -> f a -> Tagged isRecord Encoding
592−
593−instance OVERLAPPING_ TaggedObjectEnc' U1 False where
594− taggedObjectEnc' _ _ _ = Tagged mempty
595−
596−instance (RecordToEncoding f) => TaggedObjectEnc' f True where
597− taggedObjectEnc' opts _ = Tagged . (E.comma <>) . fst . recordToEncoding opts
598−
599−instance (GToEncoding f) => TaggedObjectEnc' f False where
600− taggedObjectEnc' opts contentsFieldName =
601− Tagged . (\z -> E.comma <> toEncoding contentsFieldName <> E.colon <> z) .
602− gToEncoding opts
907+class TaggedObject enc arity f where
908+ taggedObject :: Options -> ToArgs enc arity a
909+ -> String -> String
910+ -> f a -> enc
911+
912+instance ( TaggedObject enc arity a
913+ , TaggedObject enc arity b
914+ ) => TaggedObject enc arity (a :+: b)
915+ where
916+ taggedObject opts targs tagFieldName contentsFieldName (L1 x) =
917+ taggedObject opts targs tagFieldName contentsFieldName x
918+ taggedObject opts targs tagFieldName contentsFieldName (R1 x) =
919+ taggedObject opts targs tagFieldName contentsFieldName x
920+
921+instance ( IsRecord a isRecord
922+ , TaggedObject' enc pairs arity a isRecord
923+ , FromPairs enc pairs
924+ , FromString enc
925+ , KeyValuePair enc pairs
926+ , Constructor c
927+ ) => TaggedObject enc arity (C1 c a)
928+ where
929+ taggedObject opts targs tagFieldName contentsFieldName =
930+ fromPairs . mappend tag . contents
931+ where
932+ tag = tagFieldName `pair`
933+ (fromString (constructorTagModifier opts (conName (undefined :: t c a p)))
934+ :: enc)
935+ contents =
936+ (unTagged :: Tagged isRecord pairs -> pairs) .
937+ taggedObject' opts targs contentsFieldName . unM1
938+
939+class TaggedObject' enc pairs arity f isRecord where
940+ taggedObject' :: Options -> ToArgs enc arity a
941+ -> String -> f a -> Tagged isRecord pairs
942+
943+instance ( GToJSON enc arity f
944+ , KeyValuePair enc pairs
945+ ) => TaggedObject' enc pairs arity f False
946+ where
947+ taggedObject' opts targs contentsFieldName =
948+ Tagged . (contentsFieldName `pair`) . gToJSON opts targs
949+
950+instance OVERLAPPING_ Monoid pairs => TaggedObject' enc pairs arity U1 False where
951+ taggedObject' _ _ _ _ = Tagged mempty
952+
953+instance ( RecordToPairs enc pairs arity f
954+ ) => TaggedObject' enc pairs arity f True
955+ where
956+ taggedObject' opts targs _ = Tagged . recordToPairs opts targs
603957
604958--------------------------------------------------------------------------------
605959
@@ -614,248 +968,251 @@ instance (GetConName a, GetConName b) => GetConName (a :+: b) where
614968instance (Constructor c) => GetConName (C1 c a) where
615969 getConName = conName
616970
617−--------------------------------------------------------------------------------
618−
619−class TwoElemArrayObj f where
620− twoElemArrayObj :: Options -> f a -> V.Vector Value
621−
622−instance (TwoElemArrayObj a, TwoElemArrayObj b) => TwoElemArrayObj (a :+: b) where
623− twoElemArrayObj opts (L1 x) = twoElemArrayObj opts x
624− twoElemArrayObj opts (R1 x) = twoElemArrayObj opts x
625−
626−instance ( GToJSON a, ConsToJSON a
627− , Constructor c ) => TwoElemArrayObj (C1 c a) where
628− twoElemArrayObj opts x = V.create $ do
629− mv <- VM.unsafeNew 2
630− VM.unsafeWrite mv 0 $ String $ pack $ constructorTagModifier opts
631− $ conName (undefined :: t c a p)
632− VM.unsafeWrite mv 1 $ gToJSON opts x
633− return mv
971+-- For genericToJSONKey
972+instance GetConName a => GetConName (D1 d a) where
973+ getConName (M1 x) = getConName x
634974
635975--------------------------------------------------------------------------------
636976
637−class TwoElemArrayEnc f where
638− twoElemArrayEnc :: Options -> f a -> Encoding
977+-- Reflection of SumEncoding variants
639978
640−instance (TwoElemArrayEnc a, TwoElemArrayEnc b) => TwoElemArrayEnc (a :+: b) where
641− twoElemArrayEnc opts (L1 x) = twoElemArrayEnc opts x
642− twoElemArrayEnc opts (R1 x) = twoElemArrayEnc opts x
643−
644−instance ( GToEncoding a, ConsToEncoding a
645− , Constructor c ) => TwoElemArrayEnc (C1 c a) where
646− twoElemArrayEnc opts x = E.tuple $
647− toEncoding (constructorTagModifier opts (conName (undefined :: t c a p))) >*<
648− gToEncoding opts x
979+data ObjectWithSingleField
980+data TwoElemArray
981+data UntaggedValue
649982
650983--------------------------------------------------------------------------------
651984
652−class ConsToJSON f where
653− consToJSON :: Options -> f a -> Value
654−
655−class ConsToJSON' f isRecord where
656− consToJSON' :: Options -> Bool -- ^ Are we a record with one field?
657− -> f a -> Tagged isRecord Value
658−
659−instance ( IsRecord f isRecord
660− , ConsToJSON' f isRecord ) => ConsToJSON f where
661− consToJSON opts = (unTagged :: Tagged isRecord Value -> Value)
662− . consToJSON' opts (isUnary (undefined :: f a))
663−
664−instance (RecordToPairs f) => ConsToJSON' f True where
665− consToJSON' opts isUn f = let
666− vals = toList $ recordToPairs opts f
667− in case (unwrapUnaryRecords opts,isUn,vals) of
668− (True,True,[(_,val)]) -> Tagged val
669− _ -> Tagged $ object vals
985+class SumToJSON' s enc arity f where
986+ sumToJSON' :: Options -> ToArgs enc arity a
987+ -> f a -> Tagged s enc
670988
671−instance GToJSON f => ConsToJSON' f False where
672− consToJSON' opts _ = Tagged . gToJSON opts
989+instance ( SumToJSON' s enc arity a
990+ , SumToJSON' s enc arity b
991+ ) => SumToJSON' s enc arity (a :+: b)
992+ where
993+ sumToJSON' opts targs (L1 x) = sumToJSON' opts targs x
994+ sumToJSON' opts targs (R1 x) = sumToJSON' opts targs x
673995
674996--------------------------------------------------------------------------------
675997
676−class ConsToEncoding f where
677− consToEncoding :: Options -> f a -> Encoding
678−
679−class ConsToEncoding' f isRecord where
680− consToEncoding' :: Options -> Bool -- ^ Are we a record with one field?
681− -> f a -> Tagged isRecord Encoding
682−
683−instance ( IsRecord f isRecord
684− , ConsToEncoding' f isRecord ) => ConsToEncoding f where
685− consToEncoding opts = (unTagged :: Tagged isRecord Encoding -> Encoding)
686− . consToEncoding' opts (isUnary (undefined :: f a))
687−
688−instance (RecordToEncoding f) => ConsToEncoding' f True where
689− consToEncoding' opts isUn x =
690− let (enc, mbVal) = recordToEncoding opts x
691− in case (unwrapUnaryRecords opts, isUn, mbVal) of
692− (True, True, Just val) -> Tagged val
693− _ -> Tagged $ E.wrapObject enc
694−
695−instance GToEncoding f => ConsToEncoding' f False where
696− consToEncoding' opts _ = Tagged . gToEncoding opts
998+instance ( GToJSON Value arity a
999+ , ConsToJSON Value arity a
1000+ , Constructor c
1001+ ) => SumToJSON' TwoElemArray Value arity (C1 c a) where
1002+ sumToJSON' opts targs x = Tagged $ Array $ V.create $ do
1003+ mv <- VM.unsafeNew 2
1004+ VM.unsafeWrite mv 0 $ String $ pack $ constructorTagModifier opts
1005+ $ conName (undefined :: t c a p)
1006+ VM.unsafeWrite mv 1 $ gToJSON opts targs x
1007+ return mv
6971008
6981009--------------------------------------------------------------------------------
6991010
700−class RecordToPairs f where
701− recordToPairs :: Options -> f a -> DList Pair
702−
703−instance (RecordToPairs a, RecordToPairs b) => RecordToPairs (a :*: b) where
704− recordToPairs opts (a :*: b) = recordToPairs opts a <>
705− recordToPairs opts b
1011+instance ( GToJSON Encoding arity a
1012+ , ConsToJSON Encoding arity a
1013+ , Constructor c
1014+ ) => SumToJSON' TwoElemArray Encoding arity (C1 c a)
1015+ where
1016+ sumToJSON' opts targs x = Tagged $ E.list id
1017+ [ toEncoding (constructorTagModifier opts (conName (undefined :: t c a p)))
1018+ , gToJSON opts targs x
1019+ ]
7061020
707−instance (Selector s, GToJSON a) => RecordToPairs (S1 s a) where
708− recordToPairs = fieldToPair
709−
710−instance OVERLAPPING_ (Selector s, ToJSON a) =>
711− RecordToPairs (S1 s (K1 i (Maybe a))) where
712− recordToPairs opts (M1 k1) | omitNothingFields opts
713− , K1 Nothing <- k1 = DList.empty
714− recordToPairs opts m1 = fieldToPair opts m1
1021+--------------------------------------------------------------------------------
7151022
716−fieldToPair :: (Selector s, GToJSON a) => Options -> S1 s a p -> DList Pair
717−fieldToPair opts m1 = pure ( pack $ fieldLabelModifier opts $ selName m1
718− , gToJSON opts (unM1 m1)
719− )
1023+class ConsToJSON enc arity f where
1024+ consToJSON :: Options -> ToArgs enc arity a
1025+ -> f a -> enc
1026+
1027+class ConsToJSON' enc arity f isRecord where
1028+ consToJSON' :: Options -> ToArgs enc arity a
1029+ -> f a -> Tagged isRecord enc
1030+
1031+instance ( IsRecord f isRecord
1032+ , ConsToJSON' enc arity f isRecord
1033+ ) => ConsToJSON enc arity f
1034+ where
1035+ consToJSON opts targs =
1036+ (unTagged :: Tagged isRecord enc -> enc)
1037+ . consToJSON' opts targs
1038+ {-# INLINE consToJSON #-}
1039+
1040+instance OVERLAPPING_
1041+ ( RecordToPairs enc pairs arity (S1 s f)
1042+ , FromPairs enc pairs
1043+ , GToJSON enc arity f
1044+ ) => ConsToJSON' enc arity (S1 s f) True
1045+ where
1046+ consToJSON' opts targs
1047+ | unwrapUnaryRecords opts = Tagged . gToJSON opts targs
1048+ | otherwise = Tagged . fromPairs . recordToPairs opts targs
1049+ {-# INLINE consToJSON' #-}
1050+
1051+instance ( RecordToPairs enc pairs arity f
1052+ , FromPairs enc pairs
1053+ ) => ConsToJSON' enc arity f True
1054+ where
1055+ consToJSON' opts targs = Tagged . fromPairs . recordToPairs opts targs
1056+ {-# INLINE consToJSON' #-}
1057+
1058+instance GToJSON enc arity f => ConsToJSON' enc arity f False where
1059+ consToJSON' opts targs = Tagged . gToJSON opts targs
1060+ {-# INLINE consToJSON' #-}
7201061
7211062--------------------------------------------------------------------------------
7221063
723−class RecordToEncoding f where
1064+class RecordToPairs enc pairs arity f where
7241065 -- 1st element: whole thing
7251066 -- 2nd element: in case the record has only 1 field, just the value
7261067 -- of the field (without the key); 'Nothing' otherwise
727− recordToEncoding :: Options -> f a -> (Encoding, Maybe Encoding)
728−
729−instance (RecordToEncoding a, RecordToEncoding b) => RecordToEncoding (a :*: b) where
730− recordToEncoding opts (a :*: b) | omitNothingFields opts =
731− (mconcat $ intersperse E.comma $
732− filter (not . E.nullEncoding)
733− [fst (recordToEncoding opts a), fst (recordToEncoding opts b)]
734− , Nothing)
735− recordToEncoding opts (a :*: b) =
736− (fst (recordToEncoding opts a) <> E.comma <>
737− fst (recordToEncoding opts b),
738− Nothing)
739−
740−instance (Selector s, GToEncoding a) => RecordToEncoding (S1 s a) where
741− recordToEncoding = fieldToEncoding
742−
743−instance OVERLAPPING_ (Selector s, ToJSON a) =>
744− RecordToEncoding (S1 s (K1 i (Maybe a))) where
745− recordToEncoding opts (M1 k1) | omitNothingFields opts
746− , K1 Nothing <- k1 = (mempty, Nothing)
747− recordToEncoding opts m1 = fieldToEncoding opts m1
748−
749−fieldToEncoding :: (Selector s, GToEncoding a) => Options -> S1 s a p -> (Encoding, Maybe Encoding)
750−fieldToEncoding opts m1 =
751− let keyBuilder = toEncoding (fieldLabelModifier opts $ selName m1)
752− valueBuilder = gToEncoding opts (unM1 m1)
753− in (keyBuilder <> E.colon <> valueBuilder, Just valueBuilder)
1068+ recordToPairs :: Options -> ToArgs enc arity a
1069+ -> f a -> pairs
1070+
1071+instance ( Monoid pairs
1072+ , RecordToPairs enc pairs arity a
1073+ , RecordToPairs enc pairs arity b
1074+ ) => RecordToPairs enc pairs arity (a :*: b)
1075+ where
1076+ recordToPairs opts (targs :: ToArgs enc arity p) (a :*: b) =
1077+ pairsOf a `mappend` pairsOf b
1078+ where
1079+ pairsOf :: (RecordToPairs enc pairs arity f) => f p -> pairs
1080+ pairsOf = recordToPairs opts targs
1081+ {-# INLINE recordToPairs #-}
1082+
1083+instance ( Selector s
1084+ , GToJSON enc arity a
1085+ , KeyValuePair enc pairs
1086+ ) => RecordToPairs enc pairs arity (S1 s a)
1087+ where
1088+ recordToPairs = fieldToPair
1089+ {-# INLINE recordToPairs #-}
1090+
1091+instance INCOHERENT_
1092+ ( Selector s
1093+ , GToJSON enc arity (K1 i (Maybe a))
1094+ , KeyValuePair enc pairs
1095+ , Monoid pairs
1096+ ) => RecordToPairs enc pairs arity (S1 s (K1 i (Maybe a)))
1097+ where
1098+ recordToPairs opts _ (M1 k1) | omitNothingFields opts
1099+ , K1 Nothing <- k1 = mempty
1100+ recordToPairs opts targs m1 = fieldToPair opts targs m1
1101+ {-# INLINE recordToPairs #-}
1102+
1103+instance INCOHERENT_
1104+ ( Selector s
1105+ , GToJSON enc arity (K1 i (Maybe a))
1106+ , KeyValuePair enc pairs
1107+ , Monoid pairs
1108+ ) => RecordToPairs enc pairs arity (S1 s (K1 i (Semigroup.Option a)))
1109+ where
1110+ recordToPairs opts targs = recordToPairs opts targs . unwrap
1111+ where
1112+ unwrap :: S1 s (K1 i (Semigroup.Option a)) p -> S1 s (K1 i (Maybe a)) p
1113+ unwrap (M1 (K1 (Semigroup.Option a))) = M1 (K1 a)
1114+ {-# INLINE recordToPairs #-}
1115+
1116+fieldToPair :: (Selector s
1117+ , GToJSON enc arity a
1118+ , KeyValuePair enc pairs)
1119+ => Options -> ToArgs enc arity p
1120+ -> S1 s a p -> pairs
1121+fieldToPair opts targs m1 =
1122+ let key = fieldLabelModifier opts (selName m1)
1123+ value = gToJSON opts targs (unM1 m1)
1124+ in key `pair` value
1125+{-# INLINE fieldToPair #-}
7541126
7551127--------------------------------------------------------------------------------
7561128
757−class WriteProduct f where
1129+class WriteProduct arity f where
7581130 writeProduct :: Options
1131+ -> ToArgs Value arity a
7591132 -> VM.MVector s Value
7601133 -> Int -- ^ index
7611134 -> Int -- ^ length
7621135 -> f a
7631136 -> ST s ()
7641137
765−instance ( WriteProduct a
766− , WriteProduct b ) => WriteProduct (a :*: b) where
767− writeProduct opts mv ix len (a :*: b) = do
768− writeProduct opts mv ix lenL a
769− writeProduct opts mv ixR lenR b
1138+instance ( WriteProduct arity a
1139+ , WriteProduct arity b
1140+ ) => WriteProduct arity (a :*: b) where
1141+ writeProduct opts targs mv ix len (a :*: b) = do
1142+ writeProduct opts targs mv ix lenL a
1143+ writeProduct opts targs mv ixR lenR b
7701144 where
7711145 lenL = len `unsafeShiftR` 1
7721146 lenR = len - lenL
7731147 ixR = ix + lenL
1148+ {-# INLINE writeProduct #-}
7741149
775−instance OVERLAPPABLE_ (GToJSON a) => WriteProduct a where
776− writeProduct opts mv ix _ = VM.unsafeWrite mv ix . gToJSON opts
1150+instance OVERLAPPABLE_ (GToJSON Value arity a) => WriteProduct arity a where
1151+ writeProduct opts targs mv ix _ =
1152+ VM.unsafeWrite mv ix . gToJSON opts targs
1153+ {-# INLINE writeProduct #-}
7771154
7781155--------------------------------------------------------------------------------
7791156
780−class EncodeProduct f where
781− encodeProduct :: Options -> f a -> Encoding
1157+class EncodeProduct arity f where
1158+ encodeProduct :: Options -> ToArgs Encoding arity a
1159+ -> f a -> Encoding' E.InArray
7821160
783−instance ( EncodeProduct a
784− , EncodeProduct b ) => EncodeProduct (a :*: b) where
785− encodeProduct opts (a :*: b) | omitNothingFields opts =
786− mconcat $ intersperse E.comma $
1161+instance ( EncodeProduct arity a
1162+ , EncodeProduct arity b
1163+ ) => EncodeProduct arity (a :*: b) where
1164+ encodeProduct opts targs (a :*: b) | omitNothingFields opts =
1165+ E.econcat $ intersperse E.comma $
7871166 filter (not . E.nullEncoding)
788− [encodeProduct opts a, encodeProduct opts b]
789− encodeProduct opts (a :*: b) = encodeProduct opts a <>
790− E.comma <>
791− encodeProduct opts b
1167+ [encodeProduct opts targs a, encodeProduct opts targs b]
1168+ encodeProduct opts targs (a :*: b) =
1169+ encodeProduct opts targs a >*<
1170+ encodeProduct opts targs b
1171+ {-# INLINE encodeProduct #-}
7921172
793−instance OVERLAPPABLE_ (GToEncoding a) => EncodeProduct a where
794− encodeProduct opts = gToEncoding opts
1173+instance OVERLAPPABLE_ (GToJSON Encoding arity a) => EncodeProduct arity a where
1174+ encodeProduct opts targs a = E.retagEncoding $ gToJSON opts targs a
1175+ {-# INLINE encodeProduct #-}
7951176
7961177--------------------------------------------------------------------------------
7971178
798−class ObjectWithSingleFieldObj f where
799− objectWithSingleFieldObj :: Options -> f a -> Object
800−
801−instance ( ObjectWithSingleFieldObj a
802− , ObjectWithSingleFieldObj b ) => ObjectWithSingleFieldObj (a :+: b) where
803− objectWithSingleFieldObj opts (L1 x) = objectWithSingleFieldObj opts x
804− objectWithSingleFieldObj opts (R1 x) = objectWithSingleFieldObj opts x
805−
806−instance ( GToJSON a, ConsToJSON a
807− , Constructor c ) => ObjectWithSingleFieldObj (C1 c a) where
808− objectWithSingleFieldObj opts = H.singleton typ . gToJSON opts
1179+instance ( GToJSON enc arity a
1180+ , ConsToJSON enc arity a
1181+ , FromPairs enc pairs
1182+ , KeyValuePair enc pairs
1183+ , Constructor c
1184+ ) => SumToJSON' ObjectWithSingleField enc arity (C1 c a)
1185+ where
1186+ sumToJSON' opts targs =
1187+ Tagged . fromPairs . (typ `pair`) . gToJSON opts targs
8091188 where
810− typ = pack $ constructorTagModifier opts $
1189+ typ = constructorTagModifier opts $
8111190 conName (undefined :: t c a p)
8121191
8131192--------------------------------------------------------------------------------
8141193
815−class ObjectWithSingleFieldEnc f where
816− objectWithSingleFieldEnc :: Options -> f a -> Encoding
817−
818−instance ( ObjectWithSingleFieldEnc a
819− , ObjectWithSingleFieldEnc b ) => ObjectWithSingleFieldEnc (a :+: b) where
820− objectWithSingleFieldEnc opts (L1 x) = objectWithSingleFieldEnc opts x
821− objectWithSingleFieldEnc opts (R1 x) = objectWithSingleFieldEnc opts x
822−
823−instance ( GToEncoding a, ConsToEncoding a
824− , Constructor c ) => ObjectWithSingleFieldEnc (C1 c a) where
825− objectWithSingleFieldEnc opts v =
826− E.openCurly <>
827− toEncoding
828− (constructorTagModifier opts
829− (conName (undefined :: t c a p))) <>
830− E.colon <>
831− gToEncoding opts v <>
832− E.closeCurly
1194+instance OVERLAPPABLE_
1195+ ( ConsToJSON enc arity a
1196+ ) => SumToJSON' UntaggedValue enc arity (C1 c a)
1197+ where
1198+ sumToJSON' opts targs = Tagged . gToJSON opts targs
1199+
1200+instance OVERLAPPING_
1201+ ( Constructor c
1202+ , FromString enc
1203+ ) => SumToJSON' UntaggedValue enc arity (C1 c U1)
1204+ where
1205+ sumToJSON' opts _ _ = Tagged . fromString $
1206+ constructorTagModifier opts $ conName (undefined :: t c U1 p)
8331207
8341208-------------------------------------------------------------------------------
8351209-- Instances
8361210-------------------------------------------------------------------------------
8371211
838−
839−
8401212-------------------------------------------------------------------------------
8411213-- base
8421214-------------------------------------------------------------------------------
8431215
844−instance ToJSON1 Identity where
845− liftToJSON t _ (Identity a) = t a
846− {-# INLINE liftToJSON #-}
847−
848− liftToEncoding t _ (Identity a) = t a
849− {-# INLINE liftToEncoding #-}
850−
851−instance (ToJSON a) => ToJSON (Identity a) where
852− toJSON = toJSON1
853− {-# INLINE toJSON #-}
854−
855− toEncoding = toEncoding1
856− {-# INLINE toEncoding #-}
857−
858−
8591216instance ToJSON2 Const where
8601217 liftToJSON2 t _ _ _ (Const x) = t x
8611218 {-# INLINE liftToJSON2 #-}
@@ -884,7 +1241,7 @@ instance ToJSON1 Maybe where
8841241 {-# INLINE liftToJSON #-}
8851242
8861243 liftToEncoding t _ (Just a) = t a
887− liftToEncoding _ _ Nothing = Encoding EB.null_
1244+ liftToEncoding _ _ Nothing = E.null_
8881245 {-# INLINE liftToEncoding #-}
8891246
8901247instance (ToJSON a) => ToJSON (Maybe a) where
@@ -896,19 +1253,13 @@ instance (ToJSON a) => ToJSON (Maybe a) where
8961253
8971254
8981255instance ToJSON2 Either where
899− liftToJSON2 toA _ _toB _ (Left a) = Object $ H.singleton left (toA a)
900− liftToJSON2 _toA _ toB _ (Right b) = Object $ H.singleton right (toB b)
1256+ liftToJSON2 toA _ _toB _ (Left a) = Object $ H.singleton "Left" (toA a)
1257+ liftToJSON2 _toA _ toB _ (Right b) = Object $ H.singleton "Right" (toB b)
9011258 {-# INLINE liftToJSON2 #-}
9021259
903− liftToEncoding2 toA _ _toB _ (Left a) =
904− Encoding (B.shortByteString "{\"Left\":")
905− <> toA a
906− <> Encoding (B.char7 '}')
1260+ liftToEncoding2 toA _ _toB _ (Left a) = E.pairs $ E.pair "Left" $ toA a
9071261
908− liftToEncoding2 _toA _ toB _ (Right b) =
909− Encoding (B.shortByteString "{\"Right\":")
910− <> toB b
911− <> Encoding (B.char7 '}')
1262+ liftToEncoding2 _toA _ toB _ (Right b) = E.pairs $ E.pair "Right" $ toB b
9121263 {-# INLINE liftToEncoding2 #-}
9131264
9141265instance (ToJSON a) => ToJSON1 (Either a) where
@@ -925,18 +1276,24 @@ instance (ToJSON a, ToJSON b) => ToJSON (Either a b) where
9251276 toEncoding = toEncoding2
9261277 {-# INLINE toEncoding #-}
9271278
928−left, right :: Text
929−left = "Left"
930−right = "Right"
1279+instance ToJSON Void where
1280+ toJSON = absurd
1281+ {-# INLINE toJSON #-}
1282+
1283+ toEncoding = absurd
1284+ {-# INLINE toEncoding #-}
9311285
9321286
9331287instance ToJSON Bool where
9341288 toJSON = Bool
9351289 {-# INLINE toJSON #-}
9361290
937− toEncoding = Encoding . EB.bool
1291+ toEncoding = E.bool
9381292 {-# INLINE toEncoding #-}
9391293
1294+instance ToJSONKey Bool where
1295+ toJSONKey = toJSONKeyText $ \x -> if x then "true" else "false"
1296+
9401297
9411298instance ToJSON Ordering where
9421299 toJSON = toJSON . orderingToText
@@ -963,10 +1320,10 @@ instance ToJSON Char where
9631320 toJSONList = String . T.pack
9641321 {-# INLINE toJSONList #-}
9651322
966− toEncoding = Encoding . EB.string . (:[])
1323+ toEncoding = E.string . (:[])
9671324 {-# INLINE toEncoding #-}
9681325
969− toEncodingList = Encoding . EB.string
1326+ toEncodingList = E.string
9701327 {-# INLINE toEncodingList #-}
9711328
9721329
@@ -974,9 +1331,13 @@ instance ToJSON Double where
9741331 toJSON = realFloatToJSON
9751332 {-# INLINE toJSON #-}
9761333
977− toEncoding = realFloatToEncoding
1334+ toEncoding = E.double
9781335 {-# INLINE toEncoding #-}
9791336
1337+instance ToJSONKey Double where
1338+ toJSONKey = toJSONKeyTextEnc E.doubleText
1339+ {-# INLINE toJSONKey #-}
1340+
9801341
9811342instance ToJSON Number where
9821343 toJSON (D d) = toJSON d
@@ -992,20 +1353,23 @@ instance ToJSON Float where
9921353 toJSON = realFloatToJSON
9931354 {-# INLINE toJSON #-}
9941355
995− toEncoding = realFloatToEncoding
1356+ toEncoding = E.float
9961357 {-# INLINE toEncoding #-}
9971358
1359+instance ToJSONKey Float where
1360+ toJSONKey = toJSONKeyTextEnc E.floatText
1361+ {-# INLINE toJSONKey #-}
1362+
9981363
999−instance ToJSON (Ratio Integer) where
1364+instance (ToJSON a, Integral a) => ToJSON (Ratio a) where
10001365 toJSON r = object [ "numerator" .= numerator r
10011366 , "denominator" .= denominator r
10021367 ]
10031368 {-# INLINE toJSON #-}
10041369
1005− toEncoding r = Encoding $
1006− B.shortByteString "{\"numerator\":" <> builder (numerator r) <>
1007− B.shortByteString ",\"denominator\":" <> builder (denominator r) <>
1008− B.char7 '}'
1370+ toEncoding r = E.pairs $
1371+ "numerator" .= numerator r <>
1372+ "denominator" .= denominator r
10091373 {-# INLINE toEncoding #-}
10101374
10111375
@@ -1013,24 +1377,37 @@ instance HasResolution a => ToJSON (Fixed a) where
10131377 toJSON = Number . realToFrac
10141378 {-# INLINE toJSON #-}
10151379
1016− toEncoding = Encoding . EB.number . realToFrac
1380+ toEncoding = E.scientific . realToFrac
10171381 {-# INLINE toEncoding #-}
10181382
1383+instance HasResolution a => ToJSONKey (Fixed a) where
1384+ toJSONKey = toJSONKeyTextEnc (E.scientificText . realToFrac)
1385+ {-# INLINE toJSONKey #-}
1386+
10191387
10201388instance ToJSON Int where
10211389 toJSON = Number . fromIntegral
10221390 {-# INLINE toJSON #-}
10231391
1024− toEncoding = Encoding . B.intDec
1392+ toEncoding = E.int
10251393 {-# INLINE toEncoding #-}
10261394
1395+instance ToJSONKey Int where
1396+ toJSONKey = toJSONKeyTextEnc E.intText
1397+ {-# INLINE toJSONKey #-}
1398+
1399+
10271400instance ToJSON Integer where
10281401 toJSON = Number . fromInteger
10291402 {-# INLINE toJSON #-}
10301403
1031− toEncoding = Encoding . B.integerDec
1404+ toEncoding = E.integer
10321405 {-# INLINE toEncoding #-}
10331406
1407+instance ToJSONKey Integer where
1408+ toJSONKey = toJSONKeyTextEnc E.integerText
1409+ {-# INLINE toJSONKey #-}
1410+
10341411
10351412instance ToJSON Natural where
10361413 toJSON = toJSON . toInteger
@@ -1039,93 +1416,147 @@ instance ToJSON Natural where
10391416 toEncoding = toEncoding . toInteger
10401417 {-# INLINE toEncoding #-}
10411418
1419+instance ToJSONKey Natural where
1420+ toJSONKey = toJSONKeyTextEnc (E.integerText . toInteger)
1421+ {-# INLINE toJSONKey #-}
1422+
10421423
10431424instance ToJSON Int8 where
10441425 toJSON = Number . fromIntegral
10451426 {-# INLINE toJSON #-}
10461427
1047− toEncoding = Encoding . B.int8Dec
1428+ toEncoding = E.int8
10481429 {-# INLINE toEncoding #-}
10491430
1431+instance ToJSONKey Int8 where
1432+ toJSONKey = toJSONKeyTextEnc E.int8Text
1433+ {-# INLINE toJSONKey #-}
1434+
10501435
10511436instance ToJSON Int16 where
10521437 toJSON = Number . fromIntegral
10531438 {-# INLINE toJSON #-}
10541439
1055− toEncoding = Encoding . B.int16Dec
1440+ toEncoding = E.int16
10561441 {-# INLINE toEncoding #-}
10571442
1443+instance ToJSONKey Int16 where
1444+ toJSONKey = toJSONKeyTextEnc E.int16Text
1445+ {-# INLINE toJSONKey #-}
1446+
10581447
10591448instance ToJSON Int32 where
10601449 toJSON = Number . fromIntegral
10611450 {-# INLINE toJSON #-}
10621451
1063− toEncoding = Encoding . B.int32Dec
1452+ toEncoding = E.int32
10641453 {-# INLINE toEncoding #-}
10651454
1455+instance ToJSONKey Int32 where
1456+ toJSONKey = toJSONKeyTextEnc E.int32Text
1457+ {-# INLINE toJSONKey #-}
1458+
10661459
10671460instance ToJSON Int64 where
10681461 toJSON = Number . fromIntegral
10691462 {-# INLINE toJSON #-}
10701463
1071− toEncoding = Encoding . B.int64Dec
1464+ toEncoding = E.int64
10721465 {-# INLINE toEncoding #-}
10731466
1467+instance ToJSONKey Int64 where
1468+ toJSONKey = toJSONKeyTextEnc E.int64Text
1469+ {-# INLINE toJSONKey #-}
10741470
10751471instance ToJSON Word where
10761472 toJSON = Number . fromIntegral
10771473 {-# INLINE toJSON #-}
10781474
1079− toEncoding = Encoding . B.wordDec
1475+ toEncoding = E.word
10801476 {-# INLINE toEncoding #-}
10811477
1478+instance ToJSONKey Word where
1479+ toJSONKey = toJSONKeyTextEnc E.wordText
1480+ {-# INLINE toJSONKey #-}
1481+
10821482
10831483instance ToJSON Word8 where
10841484 toJSON = Number . fromIntegral
10851485 {-# INLINE toJSON #-}
10861486
1087− toEncoding = Encoding . B.word8Dec
1487+ toEncoding = E.word8
10881488 {-# INLINE toEncoding #-}
10891489
1490+instance ToJSONKey Word8 where
1491+ toJSONKey = toJSONKeyTextEnc E.word8Text
1492+ {-# INLINE toJSONKey #-}
1493+
10901494
10911495instance ToJSON Word16 where
10921496 toJSON = Number . fromIntegral
10931497 {-# INLINE toJSON #-}
10941498
1095− toEncoding = Encoding . B.word16Dec
1499+ toEncoding = E.word16
10961500 {-# INLINE toEncoding #-}
10971501
1502+instance ToJSONKey Word16 where
1503+ toJSONKey = toJSONKeyTextEnc E.word16Text
1504+ {-# INLINE toJSONKey #-}
1505+
10981506
10991507instance ToJSON Word32 where
11001508 toJSON = Number . fromIntegral
11011509 {-# INLINE toJSON #-}
11021510
1103− toEncoding = Encoding . B.word32Dec
1511+ toEncoding = E.word32
11041512 {-# INLINE toEncoding #-}
11051513
1514+instance ToJSONKey Word32 where
1515+ toJSONKey = toJSONKeyTextEnc E.word32Text
1516+ {-# INLINE toJSONKey #-}
1517+
1518+
11061519instance ToJSON Word64 where
11071520 toJSON = Number . fromIntegral
11081521 {-# INLINE toJSON #-}
11091522
1110− toEncoding = Encoding . B.word64Dec
1523+ toEncoding = E.word64
1524+ {-# INLINE toEncoding #-}
1525+
1526+instance ToJSONKey Word64 where
1527+ toJSONKey = toJSONKeyTextEnc E.word64Text
1528+ {-# INLINE toJSONKey #-}
1529+
1530+instance ToJSON CTime where
1531+ toJSON (CTime i) = toJSON i
1532+ {-# INLINE toJSON #-}
1533+
1534+ toEncoding (CTime i) = toEncoding i
11111535 {-# INLINE toEncoding #-}
11121536
11131537instance ToJSON Text where
11141538 toJSON = String
11151539 {-# INLINE toJSON #-}
11161540
1117− toEncoding = Encoding . EB.text
1541+ toEncoding = E.text
11181542 {-# INLINE toEncoding #-}
11191543
1544+instance ToJSONKey Text where
1545+ toJSONKey = toJSONKeyText id
1546+ {-# INLINE toJSONKey #-}
1547+
1548+
11201549instance ToJSON LT.Text where
11211550 toJSON = String . LT.toStrict
11221551 {-# INLINE toJSON #-}
11231552
1124− toEncoding t = Encoding $
1125− B.char7 '"' <>
1126− LT.foldrChunks (\x xs -> EB.unquoted x <> xs) (B.char7 '"') t
1553+ toEncoding = E.lazyText
11271554 {-# INLINE toEncoding #-}
11281555
1556+instance ToJSONKey LT.Text where
1557+ toJSONKey = toJSONKeyText LT.toStrict
1558+
1559+
11291560instance ToJSON Version where
11301561 toJSON = toJSON . showVersion
11311562 {-# INLINE toJSON #-}
@@ -1133,6 +1564,8 @@ instance ToJSON Version where
11331564 toEncoding = toEncoding . showVersion
11341565 {-# INLINE toEncoding #-}
11351566
1567+instance ToJSONKey Version where
1568+ toJSONKey = toJSONKeyText (T.pack . showVersion)
11361569
11371570-------------------------------------------------------------------------------
11381571-- semigroups NonEmpty
@@ -1160,7 +1593,138 @@ instance ToJSON Scientific where
11601593 toJSON = Number
11611594 {-# INLINE toJSON #-}
11621595
1163− toEncoding = Encoding . EB.number
1596+ toEncoding = E.scientific
1597+ {-# INLINE toEncoding #-}
1598+
1599+instance ToJSONKey Scientific where
1600+ toJSONKey = toJSONKeyTextEnc E.scientificText
1601+
1602+-------------------------------------------------------------------------------
1603+-- DList
1604+-------------------------------------------------------------------------------
1605+
1606+instance ToJSON1 DList.DList where
1607+ liftToJSON t _ = listValue t . toList
1608+ {-# INLINE liftToJSON #-}
1609+
1610+ liftToEncoding t _ = listEncoding t . toList
1611+ {-# INLINE liftToEncoding #-}
1612+
1613+instance (ToJSON a) => ToJSON (DList.DList a) where
1614+ toJSON = toJSON1
1615+ {-# INLINE toJSON #-}
1616+
1617+ toEncoding = toEncoding1
1618+ {-# INLINE toEncoding #-}
1619+
1620+-------------------------------------------------------------------------------
1621+-- transformers - Functors
1622+-------------------------------------------------------------------------------
1623+
1624+instance ToJSON1 Identity where
1625+ liftToJSON t _ (Identity a) = t a
1626+ {-# INLINE liftToJSON #-}
1627+
1628+ liftToJSONList _ tl xs = tl (map runIdentity xs)
1629+ {-# INLINE liftToJSONList #-}
1630+
1631+ liftToEncoding t _ (Identity a) = t a
1632+ {-# INLINE liftToEncoding #-}
1633+
1634+ liftToEncodingList _ tl xs = tl (map runIdentity xs)
1635+ {-# INLINE liftToEncodingList #-}
1636+
1637+instance (ToJSON a) => ToJSON (Identity a) where
1638+ toJSON = toJSON1
1639+ {-# INLINE toJSON #-}
1640+
1641+ toJSONList = liftToJSONList toJSON toJSONList
1642+ {-# INLINE toJSONList #-}
1643+
1644+ toEncoding = toEncoding1
1645+ {-# INLINE toEncoding #-}
1646+
1647+ toEncodingList = liftToEncodingList toEncoding toEncodingList
1648+ {-# INLINE toEncodingList #-}
1649+
1650+instance (ToJSONKey a) => ToJSONKey (Identity a) where
1651+ toJSONKey = contramapToJSONKeyFunction runIdentity toJSONKey
1652+ toJSONKeyList = contramapToJSONKeyFunction (map runIdentity) toJSONKeyList
1653+
1654+
1655+instance (ToJSON1 f, ToJSON1 g) => ToJSON1 (Compose f g) where
1656+ liftToJSON tv tvl (Compose x) = liftToJSON g gl x
1657+ where
1658+ g = liftToJSON tv tvl
1659+ gl = liftToJSONList tv tvl
1660+ {-# INLINE liftToJSON #-}
1661+
1662+ liftToJSONList te tel xs = liftToJSONList g gl (map getCompose xs)
1663+ where
1664+ g = liftToJSON te tel
1665+ gl = liftToJSONList te tel
1666+ {-# INLINE liftToJSONList #-}
1667+
1668+ liftToEncoding te tel (Compose x) = liftToEncoding g gl x
1669+ where
1670+ g = liftToEncoding te tel
1671+ gl = liftToEncodingList te tel
1672+ {-# INLINE liftToEncoding #-}
1673+
1674+ liftToEncodingList te tel xs = liftToEncodingList g gl (map getCompose xs)
1675+ where
1676+ g = liftToEncoding te tel
1677+ gl = liftToEncodingList te tel
1678+ {-# INLINE liftToEncodingList #-}
1679+
1680+instance (ToJSON1 f, ToJSON1 g, ToJSON a) => ToJSON (Compose f g a) where
1681+ toJSON = toJSON1
1682+ {-# INLINE toJSON #-}
1683+
1684+ toJSONList = liftToJSONList toJSON toJSONList
1685+ {-# INLINE toJSONList #-}
1686+
1687+ toEncoding = toEncoding1
1688+ {-# INLINE toEncoding #-}
1689+
1690+ toEncodingList = liftToEncodingList toEncoding toEncodingList
1691+ {-# INLINE toEncodingList #-}
1692+
1693+
1694+instance (ToJSON1 f, ToJSON1 g) => ToJSON1 (Product f g) where
1695+ liftToJSON tv tvl (Pair x y) = liftToJSON2 tx txl ty tyl (x, y)
1696+ where
1697+ tx = liftToJSON tv tvl
1698+ txl = liftToJSONList tv tvl
1699+ ty = liftToJSON tv tvl
1700+ tyl = liftToJSONList tv tvl
1701+
1702+ liftToEncoding te tel (Pair x y) = liftToEncoding2 tx txl ty tyl (x, y)
1703+ where
1704+ tx = liftToEncoding te tel
1705+ txl = liftToEncodingList te tel
1706+ ty = liftToEncoding te tel
1707+ tyl = liftToEncodingList te tel
1708+
1709+instance (ToJSON1 f, ToJSON1 g, ToJSON a) => ToJSON (Product f g a) where
1710+ toJSON = toJSON1
1711+ {-# INLINE toJSON #-}
1712+
1713+ toEncoding = toEncoding1
1714+ {-# INLINE toEncoding #-}
1715+
1716+instance (ToJSON1 f, ToJSON1 g) => ToJSON1 (Sum f g) where
1717+ liftToJSON tv tvl (InL x) = Object $ H.singleton "InL" (liftToJSON tv tvl x)
1718+ liftToJSON tv tvl (InR y) = Object $ H.singleton "InR" (liftToJSON tv tvl y)
1719+
1720+ liftToEncoding te tel (InL x) = E.pairs $ E.pair "InL" $ liftToEncoding te tel x
1721+ liftToEncoding te tel (InR y) = E.pairs $ E.pair "InR" $ liftToEncoding te tel y
1722+
1723+instance (ToJSON1 f, ToJSON1 g, ToJSON a) => ToJSON (Sum f g a) where
1724+ toJSON = toJSON1
1725+ {-# INLINE toJSON #-}
1726+
1727+ toEncoding = toEncoding1
11641728 {-# INLINE toEncoding #-}
11651729
11661730-------------------------------------------------------------------------------
@@ -1228,17 +1792,15 @@ instance ToJSON a => ToJSON (IntMap.IntMap a) where
12281792
12291793instance ToJSONKey k => ToJSON1 (M.Map k) where
12301794 liftToJSON g _ = case toJSONKey of
1231− ToJSONKeyText (f,_) -> Object . mapHashKeyVal f g
1232− ToJSONKeyValue (f,_) -> Array . V.fromList . map (toJSONPair f g) . M.toList
1795+ ToJSONKeyText f _ -> Object . mapHashKeyVal f g
1796+ ToJSONKeyValue f _ -> Array . V.fromList . map (toJSONPair f g) . M.toList
12331797 {-# INLINE liftToJSON #-}
12341798
1235− -- liftToEncoding :: forall a. (a -> Encoding) -> ([a] -> Encoding) -> M.Map k a -> Encoding
12361799 liftToEncoding g _ = case toJSONKey of
1237− ToJSONKeyText (_,f) -> dict f g M.foldrWithKey
1238− ToJSONKeyValue (_,f) -> listEncoding (pairEncoding f) . M.toList
1800+ ToJSONKeyText _ f -> dict f g M.foldrWithKey
1801+ ToJSONKeyValue _ f -> listEncoding (pairEncoding f) . M.toList
12391802 where
1240− -- pairEncoding :: (k -> Encoding) -> (k, a) -> Encoding
1241− pairEncoding f (a, b) = tuple $ f a >*< g b
1803+ pairEncoding f (a, b) = E.list id [f a, g b]
12421804 {-# INLINE liftToEncoding #-}
12431805
12441806
@@ -1276,6 +1838,17 @@ instance (ToJSON v) => ToJSON (Tree.Tree v) where
12761838 toEncoding = toEncoding1
12771839 {-# INLINE toEncoding #-}
12781840
1841+-------------------------------------------------------------------------------
1842+-- uuid
1843+-------------------------------------------------------------------------------
1844+
1845+instance ToJSON UUID.UUID where
1846+ toJSON = toJSON . UUID.toText
1847+ toEncoding = E.unsafeToEncoding . EB.quote . B.byteString . UUID.toASCIIBytes
1848+
1849+instance ToJSONKey UUID.UUID where
1850+ toJSONKey = ToJSONKeyText UUID.toText $
1851+ E.unsafeToEncoding . EB.quote . B.byteString . UUID.toASCIIBytes
12791852
12801853-------------------------------------------------------------------------------
12811854-- vector
@@ -1285,29 +1858,20 @@ instance ToJSON1 Vector where
12851858 liftToJSON t _ = Array . V.map t
12861859 {-# INLINE liftToJSON #-}
12871860
1288− liftToEncoding t _ xs
1289− | V.null xs = emptyArray_
1290− | otherwise = Encoding $
1291− B.char7 '[' <> fromEncoding (t (V.unsafeHead xs)) <>
1292− V.foldr go (B.char7 ']') (V.unsafeTail xs)
1293− where
1294− go v b = B.char7 ',' <> fromEncoding (t v) <> b
1861+ liftToEncoding t _ = listEncoding t . V.toList
12951862 {-# INLINE liftToEncoding #-}
12961863
12971864instance (ToJSON a) => ToJSON (Vector a) where
1298− toJSON = Array . V.map toJSON
1865+ {-# SPECIALIZE instance ToJSON Array #-}
1866+
1867+ toJSON = toJSON1
12991868 {-# INLINE toJSON #-}
13001869
1301− toEncoding = encodeVector
1870+ toEncoding = toEncoding1
13021871 {-# INLINE toEncoding #-}
13031872
13041873encodeVector :: (ToJSON a, VG.Vector v a) => v a -> Encoding
1305−encodeVector xs
1306− | VG.null xs = emptyArray_
1307− | otherwise = Encoding $
1308− B.char7 '[' <> builder (VG.unsafeHead xs) <>
1309− VG.foldr go (B.char7 ']') (VG.unsafeTail xs)
1310− where go v b = B.char7 ',' <> builder v <> b
1874+encodeVector = listEncoding toEncoding . VG.toList
13111875{-# INLINE encodeVector #-}
13121876
13131877vectorToJSON :: (VG.Vector v a, ToJSON a) => v a -> Value
@@ -1358,20 +1922,21 @@ instance (ToJSON a) => ToJSON (HashSet.HashSet a) where
13581922
13591923instance ToJSONKey k => ToJSON1 (H.HashMap k) where
13601924 liftToJSON g _ = case toJSONKey of
1361− ToJSONKeyText (f,_) -> Object . mapKeyVal f g
1362− ToJSONKeyValue (f,_) -> Array . V.fromList . map (toJSONPair f g) . H.toList
1925+ ToJSONKeyText f _ -> Object . mapKeyVal f g
1926+ ToJSONKeyValue f _ -> Array . V.fromList . map (toJSONPair f g) . H.toList
13631927 {-# INLINE liftToJSON #-}
13641928
13651929 -- liftToEncoding :: forall a. (a -> Encoding) -> ([a] -> Encoding) -> H.HashMap k a -> Encoding
13661930 liftToEncoding g _ = case toJSONKey of
1367− ToJSONKeyText (_,f) -> dict f g H.foldrWithKey
1368− ToJSONKeyValue (_,f) -> listEncoding (pairEncoding f) . H.toList
1931+ ToJSONKeyText _ f -> dict f g H.foldrWithKey
1932+ ToJSONKeyValue _ f -> listEncoding (pairEncoding f) . H.toList
13691933 where
1370− -- pairEncoding :: (k -> Encoding) -> (k, a) -> Encoding
1371− pairEncoding f (a, b) = tuple $ f a >*< g b
1934+ pairEncoding f (a, b) = E.list id [f a, g b]
13721935 {-# INLINE liftToEncoding #-}
13731936
13741937instance (ToJSON v, ToJSONKey k) => ToJSON (H.HashMap k v) where
1938+ {-# SPECIALIZE instance ToJSON Object #-}
1939+
13751940 toJSON = toJSON1
13761941 {-# INLINE toJSON #-}
13771942
@@ -1386,7 +1951,7 @@ instance ToJSON Value where
13861951 toJSON a = a
13871952 {-# INLINE toJSON #-}
13881953
1389− toEncoding = Encoding . EB.encodeToBuilder
1954+ toEncoding = E.value
13901955 {-# INLINE toEncoding #-}
13911956
13921957instance ToJSON DotNetTime where
@@ -1398,69 +1963,159 @@ dotNetTime :: DotNetTime -> String
13981963dotNetTime (DotNetTime t) = secs ++ formatMillis t ++ ")/"
13991964 where secs = formatTime defaultTimeLocale "/Date(%s" t
14001965
1966+formatMillis :: (FormatTime t) => t -> String
1967+formatMillis = take 3 . formatTime defaultTimeLocale "%q"
1968+
1969+-------------------------------------------------------------------------------
1970+-- primitive
1971+-------------------------------------------------------------------------------
1972+
1973+instance ToJSON a => ToJSON (PM.Array a) where
1974+ -- note: we could do better than this if vector exposed the data
1975+ -- constructor in Data.Vector.
1976+ toJSON = toJSON . Exts.toList
1977+ toEncoding = toEncoding . Exts.toList
1978+
1979+instance ToJSON a => ToJSON (PM.SmallArray a) where
1980+ toJSON = toJSON . Exts.toList
1981+ toEncoding = toEncoding . Exts.toList
1982+
1983+#if (MIN_VERSION_primitive(0,6,4))
1984+instance (PM.Prim a,ToJSON a) => ToJSON (PM.PrimArray a) where
1985+ toJSON = toJSON . Exts.toList
1986+ toEncoding = toEncoding . Exts.toList
1987+
1988+#if !MIN_VERSION_primitive(0,7,0)
1989+instance (PM.PrimUnlifted a,ToJSON a) => ToJSON (PM.UnliftedArray a) where
1990+ toJSON = toJSON . Exts.toList
1991+ toEncoding = toEncoding . Exts.toList
1992+#endif
1993+#endif
1994+
14011995-------------------------------------------------------------------------------
14021996-- time
14031997-------------------------------------------------------------------------------
14041998
14051999instance ToJSON Day where
1406− toJSON = stringEncoding
1407− toEncoding z = Encoding (EB.quote $ EB.day z)
2000+ toJSON = stringEncoding . E.day
2001+ toEncoding = E.day
2002+
2003+instance ToJSONKey Day where
2004+ toJSONKey = toJSONKeyTextEnc E.day
14082005
14092006
14102007instance ToJSON TimeOfDay where
1411− toJSON = stringEncoding
1412− toEncoding z = Encoding (EB.quote $ EB.timeOfDay z)
2008+ toJSON = stringEncoding . E.timeOfDay
2009+ toEncoding = E.timeOfDay
2010+
2011+instance ToJSONKey TimeOfDay where
2012+ toJSONKey = toJSONKeyTextEnc E.timeOfDay
14132013
14142014
14152015instance ToJSON LocalTime where
1416− toJSON = stringEncoding
1417− toEncoding z = Encoding (EB.quote $ EB.localTime z)
2016+ toJSON = stringEncoding . E.localTime
2017+ toEncoding = E.localTime
2018+
2019+instance ToJSONKey LocalTime where
2020+ toJSONKey = toJSONKeyTextEnc E.localTime
2021+
14182022
14192023instance ToJSON ZonedTime where
1420− toJSON = stringEncoding
2024+ toJSON = stringEncoding . E.zonedTime
2025+ toEncoding = E.zonedTime
14212026
1422− toEncoding z = Encoding (EB.quote $ EB.zonedTime z)
2027+instance ToJSONKey ZonedTime where
2028+ toJSONKey = toJSONKeyTextEnc E.zonedTime
14232029
1424−formatMillis :: (FormatTime t) => t -> String
1425−formatMillis = take 3 . formatTime defaultTimeLocale "%q"
14262030
14272031instance ToJSON UTCTime where
1428− toJSON = stringEncoding
2032+ toJSON = stringEncoding . E.utcTime
2033+ toEncoding = E.utcTime
14292034
1430− toEncoding t = Encoding (EB.quote $ EB.utcTime t)
2035+instance ToJSONKey UTCTime where
2036+ toJSONKey = toJSONKeyTextEnc E.utcTime
14312037
14322038-- | Encode something t a JSON string.
1433−--
1434−-- TODO: remove me, this is a hack
1435−stringEncoding :: (ToJSON a) => a -> Value
2039+stringEncoding :: Encoding' Text -> Value
14362040stringEncoding = String
14372041 . T.dropAround (== '"')
14382042 . T.decodeLatin1
14392043 . L.toStrict
1440− . B.toLazyByteString
1441− . fromEncoding
1442− . toEncoding
2044+ . E.encodingToLazyByteString
14432045{-# INLINE stringEncoding #-}
14442046
2047+
14452048instance ToJSON NominalDiffTime where
14462049 toJSON = Number . realToFrac
14472050 {-# INLINE toJSON #-}
14482051
1449− toEncoding = Encoding . EB.number . realToFrac
2052+ toEncoding = E.scientific . realToFrac
14502053 {-# INLINE toEncoding #-}
14512054
2055+
2056+instance ToJSON DiffTime where
2057+ toJSON = Number . realToFrac
2058+ {-# INLINE toJSON #-}
2059+
2060+ toEncoding = E.scientific . realToFrac
2061+ {-# INLINE toEncoding #-}
2062+
2063+-- | Encoded as number
2064+instance ToJSON SystemTime where
2065+ toJSON (MkSystemTime secs nsecs) =
2066+ toJSON (fromIntegral secs + fromIntegral nsecs / 1000000000 :: Nano)
2067+ toEncoding (MkSystemTime secs nsecs) =
2068+ toEncoding (fromIntegral secs + fromIntegral nsecs / 1000000000 :: Nano)
2069+
2070+instance ToJSON CalendarDiffTime where
2071+ toJSON (CalendarDiffTime m nt) = object
2072+ [ "months" .= m
2073+ , "time" .= nt
2074+ ]
2075+ toEncoding (CalendarDiffTime m nt) = E.pairs
2076+ ("months" .= m <> "time" .= nt)
2077+
2078+instance ToJSON CalendarDiffDays where
2079+ toJSON (CalendarDiffDays m d) = object
2080+ [ "months" .= m
2081+ , "days" .= d
2082+ ]
2083+ toEncoding (CalendarDiffDays m d) = E.pairs
2084+ ("months" .= m <> "days" .= d)
2085+
2086+instance ToJSON DayOfWeek where
2087+ toJSON Monday = "monday"
2088+ toJSON Tuesday = "tuesday"
2089+ toJSON Wednesday = "wednesday"
2090+ toJSON Thursday = "thursday"
2091+ toJSON Friday = "friday"
2092+ toJSON Saturday = "saturday"
2093+ toJSON Sunday = "sunday"
2094+
2095+toEncodingDayOfWeek :: DayOfWeek -> E.Encoding' Text
2096+toEncodingDayOfWeek Monday = E.unsafeToEncoding "\"monday\""
2097+toEncodingDayOfWeek Tuesday = E.unsafeToEncoding "\"tuesday\""
2098+toEncodingDayOfWeek Wednesday = E.unsafeToEncoding "\"wednesday\""
2099+toEncodingDayOfWeek Thursday = E.unsafeToEncoding "\"thursday\""
2100+toEncodingDayOfWeek Friday = E.unsafeToEncoding "\"friday\""
2101+toEncodingDayOfWeek Saturday = E.unsafeToEncoding "\"saturday\""
2102+toEncodingDayOfWeek Sunday = E.unsafeToEncoding "\"sunday\""
2103+
2104+instance ToJSONKey DayOfWeek where
2105+ toJSONKey = toJSONKeyTextEnc toEncodingDayOfWeek
2106+
14522107-------------------------------------------------------------------------------
14532108-- base Monoid/Semigroup
14542109-------------------------------------------------------------------------------
14552110
1456−instance ToJSON1 Dual where
1457− liftToJSON t _ = t . getDual
2111+instance ToJSON1 Monoid.Dual where
2112+ liftToJSON t _ = t . Monoid.getDual
14582113 {-# INLINE liftToJSON #-}
14592114
1460− liftToEncoding t _ = t . getDual
2115+ liftToEncoding t _ = t . Monoid.getDual
14612116 {-# INLINE liftToEncoding #-}
14622117
1463−instance ToJSON a => ToJSON (Dual a) where
2118+instance ToJSON a => ToJSON (Monoid.Dual a) where
14642119 toJSON = toJSON1
14652120 {-# INLINE toJSON #-}
14662121
@@ -1468,14 +2123,14 @@ instance ToJSON a => ToJSON (Dual a) where
14682123 {-# INLINE toEncoding #-}
14692124
14702125
1471−instance ToJSON1 First where
1472− liftToJSON t to' = liftToJSON t to' . getFirst
2126+instance ToJSON1 Monoid.First where
2127+ liftToJSON t to' = liftToJSON t to' . Monoid.getFirst
14732128 {-# INLINE liftToJSON #-}
14742129
1475− liftToEncoding t to' = liftToEncoding t to' . getFirst
2130+ liftToEncoding t to' = liftToEncoding t to' . Monoid.getFirst
14762131 {-# INLINE liftToEncoding #-}
14772132
1478−instance ToJSON a => ToJSON (First a) where
2133+instance ToJSON a => ToJSON (Monoid.First a) where
14792134 toJSON = toJSON1
14802135 {-# INLINE toJSON #-}
14812136
@@ -1483,14 +2138,103 @@ instance ToJSON a => ToJSON (First a) where
14832138 {-# INLINE toEncoding #-}
14842139
14852140
1486−instance ToJSON1 Last where
1487− liftToJSON t to' = liftToJSON t to' . getLast
2141+instance ToJSON1 Monoid.Last where
2142+ liftToJSON t to' = liftToJSON t to' . Monoid.getLast
14882143 {-# INLINE liftToJSON #-}
14892144
1490− liftToEncoding t to' = liftToEncoding t to' . getLast
2145+ liftToEncoding t to' = liftToEncoding t to' . Monoid.getLast
14912146 {-# INLINE liftToEncoding #-}
14922147
1493−instance ToJSON a => ToJSON (Last a) where
2148+instance ToJSON a => ToJSON (Monoid.Last a) where
2149+ toJSON = toJSON1
2150+ {-# INLINE toJSON #-}
2151+
2152+ toEncoding = toEncoding1
2153+ {-# INLINE toEncoding #-}
2154+
2155+
2156+instance ToJSON1 Semigroup.Min where
2157+ liftToJSON t _ (Semigroup.Min x) = t x
2158+ {-# INLINE liftToJSON #-}
2159+
2160+ liftToEncoding t _ (Semigroup.Min x) = t x
2161+ {-# INLINE liftToEncoding #-}
2162+
2163+instance ToJSON a => ToJSON (Semigroup.Min a) where
2164+ toJSON = toJSON1
2165+ {-# INLINE toJSON #-}
2166+
2167+ toEncoding = toEncoding1
2168+ {-# INLINE toEncoding #-}
2169+
2170+
2171+instance ToJSON1 Semigroup.Max where
2172+ liftToJSON t _ (Semigroup.Max x) = t x
2173+ {-# INLINE liftToJSON #-}
2174+
2175+ liftToEncoding t _ (Semigroup.Max x) = t x
2176+ {-# INLINE liftToEncoding #-}
2177+
2178+instance ToJSON a => ToJSON (Semigroup.Max a) where
2179+ toJSON = toJSON1
2180+ {-# INLINE toJSON #-}
2181+
2182+ toEncoding = toEncoding1
2183+ {-# INLINE toEncoding #-}
2184+
2185+instance ToJSON1 Semigroup.First where
2186+ liftToJSON t _ (Semigroup.First x) = t x
2187+ {-# INLINE liftToJSON #-}
2188+
2189+ liftToEncoding t _ (Semigroup.First x) = t x
2190+ {-# INLINE liftToEncoding #-}
2191+
2192+instance ToJSON a => ToJSON (Semigroup.First a) where
2193+ toJSON = toJSON1
2194+ {-# INLINE toJSON #-}
2195+
2196+ toEncoding = toEncoding1
2197+ {-# INLINE toEncoding #-}
2198+
2199+
2200+instance ToJSON1 Semigroup.Last where
2201+ liftToJSON t _ (Semigroup.Last x) = t x
2202+ {-# INLINE liftToJSON #-}
2203+
2204+ liftToEncoding t _ (Semigroup.Last x) = t x
2205+ {-# INLINE liftToEncoding #-}
2206+
2207+instance ToJSON a => ToJSON (Semigroup.Last a) where
2208+ toJSON = toJSON1
2209+ {-# INLINE toJSON #-}
2210+
2211+ toEncoding = toEncoding1
2212+ {-# INLINE toEncoding #-}
2213+
2214+
2215+instance ToJSON1 Semigroup.WrappedMonoid where
2216+ liftToJSON t _ (Semigroup.WrapMonoid x) = t x
2217+ {-# INLINE liftToJSON #-}
2218+
2219+ liftToEncoding t _ (Semigroup.WrapMonoid x) = t x
2220+ {-# INLINE liftToEncoding #-}
2221+
2222+instance ToJSON a => ToJSON (Semigroup.WrappedMonoid a) where
2223+ toJSON = toJSON1
2224+ {-# INLINE toJSON #-}
2225+
2226+ toEncoding = toEncoding1
2227+ {-# INLINE toEncoding #-}
2228+
2229+
2230+instance ToJSON1 Semigroup.Option where
2231+ liftToJSON t to' = liftToJSON t to' . Semigroup.getOption
2232+ {-# INLINE liftToJSON #-}
2233+
2234+ liftToEncoding t to' = liftToEncoding t to' . Semigroup.getOption
2235+ {-# INLINE liftToEncoding #-}
2236+
2237+instance ToJSON a => ToJSON (Semigroup.Option a) where
14942238 toJSON = toJSON1
14952239 {-# INLINE toJSON #-}
14962240
@@ -1501,14 +2245,28 @@ instance ToJSON a => ToJSON (Last a) where
15012245-- tagged
15022246-------------------------------------------------------------------------------
15032247
2248+instance ToJSON1 Proxy where
2249+ liftToJSON _ _ _ = Null
2250+ {-# INLINE liftToJSON #-}
2251+
2252+ liftToEncoding _ _ _ = E.null_
2253+ {-# INLINE liftToEncoding #-}
2254+
15042255instance ToJSON (Proxy a) where
15052256 toJSON _ = Null
15062257 {-# INLINE toJSON #-}
15072258
1508− toEncoding _ = Encoding EB.null_
2259+ toEncoding _ = E.null_
15092260 {-# INLINE toEncoding #-}
15102261
15112262
2263+instance ToJSON2 Tagged where
2264+ liftToJSON2 _ _ t _ (Tagged x) = t x
2265+ {-# INLINE liftToJSON2 #-}
2266+
2267+ liftToEncoding2 _ _ t _ (Tagged x) = t x
2268+ {-# INLINE liftToEncoding2 #-}
2269+
15122270instance ToJSON1 (Tagged a) where
15132271 liftToJSON t _ (Tagged x) = t x
15142272 {-# INLINE liftToJSON #-}
@@ -1523,7 +2281,6 @@ instance ToJSON b => ToJSON (Tagged a b) where
15232281 toEncoding = toEncoding1
15242282 {-# INLINE toEncoding #-}
15252283
1526−
15272284instance ToJSONKey b => ToJSONKey (Tagged a b) where
15282285 toJSONKey = contramapToJSONKeyFunction unTagged toJSONKey
15292286 toJSONKeyList = contramapToJSONKeyFunction (fmap unTagged) toJSONKeyList
@@ -1532,41 +2289,22 @@ instance ToJSONKey b => ToJSONKey (Tagged a b) where
15322289-- Instances for converting t map keys
15332290-------------------------------------------------------------------------------
15342291
1535−instance ToJSONKey Text where
1536− toJSONKey = ToJSONKeyText (id,toEncoding)
1537−
1538−
1539−instance ToJSONKey Bool where
1540− toJSONKey = ToJSONKeyText
1541− ( (\x -> if x then "true" else "false")
1542− , (\x -> Encoding $ if x then "\"true\"" else "\"false\"")
1543− )
1544−
1545−instance ToJSONKey Int where
1546− toJSONKey = ToJSONKeyText
1547− ( LT.toStrict . LTB.toLazyText . LTBI.decimal
1548− , \x -> Encoding $ B.char7 '"' <> fromEncoding (toEncoding x) <> B.char7 '"'
1549− )
1550−
15512292instance (ToJSON a, ToJSON b) => ToJSONKey (a,b)
15522293instance (ToJSON a, ToJSON b, ToJSON c) => ToJSONKey (a,b,c)
15532294instance (ToJSON a, ToJSON b, ToJSON c, ToJSON d) => ToJSONKey (a,b,c,d)
15542295
15552296instance ToJSONKey Char where
1556− toJSONKey = ToJSONKeyText (T.singleton, toEncoding)
1557− toJSONKeyList = ToJSONKeyText (T.pack, toEncoding . T.pack)
2297+ toJSONKey = ToJSONKeyText T.singleton (E.string . (:[]))
2298+ toJSONKeyList = toJSONKeyText T.pack
15582299
15592300instance (ToJSONKey a, ToJSON a) => ToJSONKey [a] where
15602301 toJSONKey = toJSONKeyList
15612302
1562−instance (ToJSONKey a, ToJSON a) => ToJSONKey (Identity a) where
1563− toJSONKey = contramapToJSONKeyFunction runIdentity toJSONKey
1564−
15652303-------------------------------------------------------------------------------
1566−-- Tuple instances, see tuple-instances-to.hs
2304+-- Tuple instances
15672305-------------------------------------------------------------------------------
15682306
1569−instance ToJSON2 ((,) ) where
2307+instance ToJSON2 (,) where
15702308 liftToJSON2 toA _ toB _ (a, b) = Array $ V.create $ do
15712309 mv <- VM.unsafeNew 2
15722310 VM.unsafeWrite mv 0 (toA a)
@@ -1574,9 +2312,7 @@ instance ToJSON2 ((,) ) where
15742312 return mv
15752313 {-# INLINE liftToJSON2 #-}
15762314
1577− liftToEncoding2 toA _ toB _ (a, b) = tuple $
1578− toA a >*<
1579− toB b
2315+ liftToEncoding2 toA _ toB _ (a, b) = E.list id [toA a, toB b]
15802316 {-# INLINE liftToEncoding2 #-}
15812317
15822318instance (ToJSON a) => ToJSON1 ((,) a) where
@@ -1600,10 +2336,11 @@ instance (ToJSON a) => ToJSON2 ((,,) a) where
16002336 return mv
16012337 {-# INLINE liftToJSON2 #-}
16022338
1603− liftToEncoding2 toB _ toC _ (a, b, c) = tuple $
1604− toEncoding a >*<
1605− toB b >*<
1606− toC c
2339+ liftToEncoding2 toB _ toC _ (a, b, c) = E.list id
2340+ [ toEncoding a
2341+ , toB b
2342+ , toC c
2343+ ]
16072344 {-# INLINE liftToEncoding2 #-}
16082345
16092346instance (ToJSON a, ToJSON b) => ToJSON1 ((,,) a b) where
@@ -1628,11 +2365,12 @@ instance (ToJSON a, ToJSON b) => ToJSON2 ((,,,) a b) where
16282365 return mv
16292366 {-# INLINE liftToJSON2 #-}
16302367
1631− liftToEncoding2 toC _ toD _ (a, b, c, d) = tuple $
1632− toEncoding a >*<
1633− toEncoding b >*<
1634− toC c >*<
1635− toD d
2368+ liftToEncoding2 toC _ toD _ (a, b, c, d) = E.list id
2369+ [ toEncoding a
2370+ , toEncoding b
2371+ , toC c
2372+ , toD d
2373+ ]
16362374 {-# INLINE liftToEncoding2 #-}
16372375
16382376instance (ToJSON a, ToJSON b, ToJSON c) => ToJSON1 ((,,,) a b c) where
@@ -1658,12 +2396,13 @@ instance (ToJSON a, ToJSON b, ToJSON c) => ToJSON2 ((,,,,) a b c) where
16582396 return mv
16592397 {-# INLINE liftToJSON2 #-}
16602398
1661− liftToEncoding2 toD _ toE _ (a, b, c, d, e) = tuple $
1662− toEncoding a >*<
1663− toEncoding b >*<
1664− toEncoding c >*<
1665− toD d >*<
1666− toE e
2399+ liftToEncoding2 toD _ toE _ (a, b, c, d, e) = E.list id
2400+ [ toEncoding a
2401+ , toEncoding b
2402+ , toEncoding c
2403+ , toD d
2404+ , toE e
2405+ ]
16672406 {-# INLINE liftToEncoding2 #-}
16682407
16692408instance (ToJSON a, ToJSON b, ToJSON c, ToJSON d) => ToJSON1 ((,,,,) a b c d) where
@@ -1690,13 +2429,14 @@ instance (ToJSON a, ToJSON b, ToJSON c, ToJSON d) => ToJSON2 ((,,,,,) a b c d) w
16902429 return mv
16912430 {-# INLINE liftToJSON2 #-}
16922431
1693− liftToEncoding2 toE _ toF _ (a, b, c, d, e, f) = tuple $
1694− toEncoding a >*<
1695− toEncoding b >*<
1696− toEncoding c >*<
1697− toEncoding d >*<
1698− toE e >*<
1699− toF f
2432+ liftToEncoding2 toE _ toF _ (a, b, c, d, e, f) = E.list id
2433+ [ toEncoding a
2434+ , toEncoding b
2435+ , toEncoding c
2436+ , toEncoding d
2437+ , toE e
2438+ , toF f
2439+ ]
17002440 {-# INLINE liftToEncoding2 #-}
17012441
17022442instance (ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e) => ToJSON1 ((,,,,,) a b c d e) where
@@ -1724,14 +2464,15 @@ instance (ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e) => ToJSON2 ((,,,,,,)
17242464 return mv
17252465 {-# INLINE liftToJSON2 #-}
17262466
1727− liftToEncoding2 toF _ toG _ (a, b, c, d, e, f, g) = tuple $
1728− toEncoding a >*<
1729− toEncoding b >*<
1730− toEncoding c >*<
1731− toEncoding d >*<
1732− toEncoding e >*<
1733− toF f >*<
1734− toG g
2467+ liftToEncoding2 toF _ toG _ (a, b, c, d, e, f, g) = E.list id
2468+ [ toEncoding a
2469+ , toEncoding b
2470+ , toEncoding c
2471+ , toEncoding d
2472+ , toEncoding e
2473+ , toF f
2474+ , toG g
2475+ ]
17352476 {-# INLINE liftToEncoding2 #-}
17362477
17372478instance (ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f) => ToJSON1 ((,,,,,,) a b c d e f) where
@@ -1760,15 +2501,16 @@ instance (ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f) => ToJSON2
17602501 return mv
17612502 {-# INLINE liftToJSON2 #-}
17622503
1763− liftToEncoding2 toG _ toH _ (a, b, c, d, e, f, g, h) = tuple $
1764− toEncoding a >*<
1765− toEncoding b >*<
1766− toEncoding c >*<
1767− toEncoding d >*<
1768− toEncoding e >*<
1769− toEncoding f >*<
1770− toG g >*<
1771− toH h
2504+ liftToEncoding2 toG _ toH _ (a, b, c, d, e, f, g, h) = E.list id
2505+ [ toEncoding a
2506+ , toEncoding b
2507+ , toEncoding c
2508+ , toEncoding d
2509+ , toEncoding e
2510+ , toEncoding f
2511+ , toG g
2512+ , toH h
2513+ ]
17722514 {-# INLINE liftToEncoding2 #-}
17732515
17742516instance (ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g) => ToJSON1 ((,,,,,,,) a b c d e f g) where
@@ -1798,16 +2540,17 @@ instance (ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g)
17982540 return mv
17992541 {-# INLINE liftToJSON2 #-}
18002542
1801− liftToEncoding2 toH _ toI _ (a, b, c, d, e, f, g, h, i) = tuple $
1802− toEncoding a >*<
1803− toEncoding b >*<
1804− toEncoding c >*<
1805− toEncoding d >*<
1806− toEncoding e >*<
1807− toEncoding f >*<
1808− toEncoding g >*<
1809− toH h >*<
1810− toI i
2543+ liftToEncoding2 toH _ toI _ (a, b, c, d, e, f, g, h, i) = E.list id
2544+ [ toEncoding a
2545+ , toEncoding b
2546+ , toEncoding c
2547+ , toEncoding d
2548+ , toEncoding e
2549+ , toEncoding f
2550+ , toEncoding g
2551+ , toH h
2552+ , toI i
2553+ ]
18112554 {-# INLINE liftToEncoding2 #-}
18122555
18132556instance (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) where
@@ -1838,17 +2581,18 @@ instance (ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g,
18382581 return mv
18392582 {-# INLINE liftToJSON2 #-}
18402583
1841− liftToEncoding2 toI _ toJ _ (a, b, c, d, e, f, g, h, i, j) = tuple $
1842− toEncoding a >*<
1843− toEncoding b >*<
1844− toEncoding c >*<
1845− toEncoding d >*<
1846− toEncoding e >*<
1847− toEncoding f >*<
1848− toEncoding g >*<
1849− toEncoding h >*<
1850− toI i >*<
1851− toJ j
2584+ liftToEncoding2 toI _ toJ _ (a, b, c, d, e, f, g, h, i, j) = E.list id
2585+ [ toEncoding a
2586+ , toEncoding b
2587+ , toEncoding c
2588+ , toEncoding d
2589+ , toEncoding e
2590+ , toEncoding f
2591+ , toEncoding g
2592+ , toEncoding h
2593+ , toI i
2594+ , toJ j
2595+ ]
18522596 {-# INLINE liftToEncoding2 #-}
18532597
18542598instance (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) where
@@ -1880,18 +2624,19 @@ instance (ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g,
18802624 return mv
18812625 {-# INLINE liftToJSON2 #-}
18822626
1883− liftToEncoding2 toJ _ toK _ (a, b, c, d, e, f, g, h, i, j, k) = tuple $
1884− toEncoding a >*<
1885− toEncoding b >*<
1886− toEncoding c >*<
1887− toEncoding d >*<
1888− toEncoding e >*<
1889− toEncoding f >*<
1890− toEncoding g >*<
1891− toEncoding h >*<
1892− toEncoding i >*<
1893− toJ j >*<
1894− toK k
2627+ liftToEncoding2 toJ _ toK _ (a, b, c, d, e, f, g, h, i, j, k) = E.list id
2628+ [ toEncoding a
2629+ , toEncoding b
2630+ , toEncoding c
2631+ , toEncoding d
2632+ , toEncoding e
2633+ , toEncoding f
2634+ , toEncoding g
2635+ , toEncoding h
2636+ , toEncoding i
2637+ , toJ j
2638+ , toK k
2639+ ]
18952640 {-# INLINE liftToEncoding2 #-}
18962641
18972642instance (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) where
@@ -1924,19 +2669,20 @@ instance (ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g,
19242669 return mv
19252670 {-# INLINE liftToJSON2 #-}
19262671
1927− liftToEncoding2 toK _ toL _ (a, b, c, d, e, f, g, h, i, j, k, l) = tuple $
1928− toEncoding a >*<
1929− toEncoding b >*<
1930− toEncoding c >*<
1931− toEncoding d >*<
1932− toEncoding e >*<
1933− toEncoding f >*<
1934− toEncoding g >*<
1935− toEncoding h >*<
1936− toEncoding i >*<
1937− toEncoding j >*<
1938− toK k >*<
1939− toL l
2672+ liftToEncoding2 toK _ toL _ (a, b, c, d, e, f, g, h, i, j, k, l) = E.list id
2673+ [ toEncoding a
2674+ , toEncoding b
2675+ , toEncoding c
2676+ , toEncoding d
2677+ , toEncoding e
2678+ , toEncoding f
2679+ , toEncoding g
2680+ , toEncoding h
2681+ , toEncoding i
2682+ , toEncoding j
2683+ , toK k
2684+ , toL l
2685+ ]
19402686 {-# INLINE liftToEncoding2 #-}
19412687
19422688instance (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) where
@@ -1970,20 +2716,21 @@ instance (ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g,
19702716 return mv
19712717 {-# INLINE liftToJSON2 #-}
19722718
1973− liftToEncoding2 toL _ toM _ (a, b, c, d, e, f, g, h, i, j, k, l, m) = tuple $
1974− toEncoding a >*<
1975− toEncoding b >*<
1976− toEncoding c >*<
1977− toEncoding d >*<
1978− toEncoding e >*<
1979− toEncoding f >*<
1980− toEncoding g >*<
1981− toEncoding h >*<
1982− toEncoding i >*<
1983− toEncoding j >*<
1984− toEncoding k >*<
1985− toL l >*<
1986− toM m
2719+ liftToEncoding2 toL _ toM _ (a, b, c, d, e, f, g, h, i, j, k, l, m) = E.list id
2720+ [ toEncoding a
2721+ , toEncoding b
2722+ , toEncoding c
2723+ , toEncoding d
2724+ , toEncoding e
2725+ , toEncoding f
2726+ , toEncoding g
2727+ , toEncoding h
2728+ , toEncoding i
2729+ , toEncoding j
2730+ , toEncoding k
2731+ , toL l
2732+ , toM m
2733+ ]
19872734 {-# INLINE liftToEncoding2 #-}
19882735
19892736instance (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) where
@@ -2018,21 +2765,22 @@ instance (ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g,
20182765 return mv
20192766 {-# INLINE liftToJSON2 #-}
20202767
2021− liftToEncoding2 toM _ toN _ (a, b, c, d, e, f, g, h, i, j, k, l, m, n) = tuple $
2022− toEncoding a >*<
2023− toEncoding b >*<
2024− toEncoding c >*<
2025− toEncoding d >*<
2026− toEncoding e >*<
2027− toEncoding f >*<
2028− toEncoding g >*<
2029− toEncoding h >*<
2030− toEncoding i >*<
2031− toEncoding j >*<
2032− toEncoding k >*<
2033− toEncoding l >*<
2034− toM m >*<
2035− toN n
2768+ liftToEncoding2 toM _ toN _ (a, b, c, d, e, f, g, h, i, j, k, l, m, n) = E.list id
2769+ [ toEncoding a
2770+ , toEncoding b
2771+ , toEncoding c
2772+ , toEncoding d
2773+ , toEncoding e
2774+ , toEncoding f
2775+ , toEncoding g
2776+ , toEncoding h
2777+ , toEncoding i
2778+ , toEncoding j
2779+ , toEncoding k
2780+ , toEncoding l
2781+ , toM m
2782+ , toN n
2783+ ]
20362784 {-# INLINE liftToEncoding2 #-}
20372785
20382786instance (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) where
@@ -2068,22 +2816,23 @@ instance (ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g,
20682816 return mv
20692817 {-# INLINE liftToJSON2 #-}
20702818
2071− liftToEncoding2 toN _ toO _ (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o) = tuple $
2072− toEncoding a >*<
2073− toEncoding b >*<
2074− toEncoding c >*<
2075− toEncoding d >*<
2076− toEncoding e >*<
2077− toEncoding f >*<
2078− toEncoding g >*<
2079− toEncoding h >*<
2080− toEncoding i >*<
2081− toEncoding j >*<
2082− toEncoding k >*<
2083− toEncoding l >*<
2084− toEncoding m >*<
2085− toN n >*<
2086− toO o
2819+ liftToEncoding2 toN _ toO _ (a, b, c, d, e, f, g, h, i, j, k, l, m, n, o) = E.list id
2820+ [ toEncoding a
2821+ , toEncoding b
2822+ , toEncoding c
2823+ , toEncoding d
2824+ , toEncoding e
2825+ , toEncoding f
2826+ , toEncoding g
2827+ , toEncoding h
2828+ , toEncoding i
2829+ , toEncoding j
2830+ , toEncoding k
2831+ , toEncoding l
2832+ , toEncoding m
2833+ , toN n
2834+ , toO o
2835+ ]
20872836 {-# INLINE liftToEncoding2 #-}
20882837
20892838instance (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) where
@@ -2097,3 +2846,27 @@ instance (ToJSON a, ToJSON b, ToJSON c, ToJSON d, ToJSON e, ToJSON f, ToJSON g,
20972846 {-# INLINE toJSON #-}
20982847 toEncoding = toEncoding2
20992848 {-# INLINE toEncoding #-}
2849+
2850+--------------------------------------------------------------------------------
2851+
2852+-- | Wrap a list of pairs as an object.
2853+class Monoid pairs => FromPairs enc pairs | enc -> pairs where
2854+ fromPairs :: pairs -> enc
2855+
2856+instance (a ~ Value) => FromPairs (Encoding' a) Series where
2857+ fromPairs = E.pairs
2858+
2859+instance FromPairs Value (DList Pair) where
2860+ fromPairs = object . toList
2861+
2862+-- | Like 'KeyValue' but the value is already converted to JSON
2863+-- ('Value' or 'Encoding'), and the result actually represents lists of pairs
2864+-- so it can be readily concatenated.
2865+class Monoid kv => KeyValuePair v kv where
2866+ pair :: String -> v -> kv
2867+
2868+instance (v ~ Value) => KeyValuePair v (DList Pair) where
2869+ pair k v = DList.singleton (pack k .= v)
2870+
2871+instance (e ~ Encoding) => KeyValuePair e Series where
2872+ pair = E.pairStr