@@ -5,19 +5,16 @@
5{-# LANGUAGE FlexibleInstances #-}
5{-# LANGUAGE FlexibleInstances #-}
6{-# LANGUAGE GADTs #-}
6{-# LANGUAGE GADTs #-}
7{-# LANGUAGE MultiParamTypeClasses #-}
7{-# LANGUAGE MultiParamTypeClasses #-}
8−{-# LANGUAGE NamedFieldPuns #-}
9{-# LANGUAGE NoImplicitPrelude #-}
8{-# LANGUAGE NoImplicitPrelude #-}
10{-# LANGUAGE OverloadedStrings #-}
9{-# LANGUAGE OverloadedStrings #-}
10+{-# LANGUAGE PolyKinds #-}
11{-# LANGUAGE RecordWildCards #-}
11{-# LANGUAGE RecordWildCards #-}
12{-# LANGUAGE ScopedTypeVariables #-}
12{-# LANGUAGE ScopedTypeVariables #-}
13{-# LANGUAGE TypeOperators #-}
13{-# LANGUAGE TypeOperators #-}
14+{-# LANGUAGE TupleSections #-}
14{-# LANGUAGE UndecidableInstances #-}
15{-# LANGUAGE UndecidableInstances #-}
15{-# LANGUAGE ViewPatterns #-}
16{-# LANGUAGE ViewPatterns #-}
17−#if __GLASGOW_HASKELL__ >= 706
18−{-# LANGUAGE PolyKinds #-}
21#include "incoherent-compat.h"
18#include "incoherent-compat.h"
22#include "overlapping-compat.h"
19#include "overlapping-compat.h"
@@ -45,6 +42,9 @@ module Data.Aeson.Types.FromJSON
45 , coerceFromJSONKeyFunction
42 , coerceFromJSONKeyFunction
46 , mapFromJSONKeyFunction
43 , mapFromJSONKeyFunction
48 -- * List functions
48 -- * List functions
49 , listParser
49 , listParser
@@ -118,9 +118,9 @@ import GHC.Generics
118import Numeric.Natural (Natural)
118import Numeric.Natural (Natural)
119import Text.ParserCombinators.ReadP (readP_to_S)
119import Text.ParserCombinators.ReadP (readP_to_S)
120import Unsafe.Coerce (unsafeCoerce)
120import Unsafe.Coerce (unsafeCoerce)
121−import qualified Data.Aeson.Compat as Compat
122import qualified Data.Aeson.Parser.Time as Time
121import qualified Data.Aeson.Parser.Time as Time
123import qualified Data.Attoparsec.ByteString.Char8 as A (endOfInput, parseOnly, scientific)
122import qualified Data.Attoparsec.ByteString.Char8 as A (endOfInput, parseOnly, scientific)
123+import qualified Data.ByteString.Lazy as L
124import qualified Data.DList as DList
124import qualified Data.DList as DList
125import qualified Data.HashMap.Strict as H
125import qualified Data.HashMap.Strict as H
126import qualified Data.HashSet as HashSet
126import qualified Data.HashSet as HashSet
@@ -155,18 +155,8 @@ import qualified Data.Primitive.UnliftedArray as PM
155import qualified Data.Primitive.PrimArray as PM
155import qualified Data.Primitive.PrimArray as PM
158−#ifndef HAS_COERCIBLE
159−#define HAS_COERCIBLE (__GLASGOW_HASKELL__ >= 707)
163import Data.Coerce (Coercible, coerce)
159import Data.Coerce (Coercible, coerce)
164−coerce' :: Coercible a b => a -> b
168−coerce' = unsafeCoerce
171parseIndexedJSON :: (Value -> Parser a) -> Int -> Value -> Parser a
161parseIndexedJSON :: (Value -> Parser a) -> Int -> Value -> Parser a
172parseIndexedJSON p idx value = p value <?> Index idx
162parseIndexedJSON p idx value = p value <?> Index idx
@@ -406,6 +396,16 @@ class FromJSON a where
406-- > newtype SomeId = SomeId { getSomeId :: Text }
396-- > newtype SomeId = SomeId { getSomeId :: Text }
407-- > deriving (Eq,Ord,Hashable,FromJSONKey)
397-- > deriving (Eq,Ord,Hashable,FromJSONKey)
399+-- If you have a sum of nullary constructors, you may use the generic
403+-- data Color = Red | Green | Blue
406+-- instance 'FromJSONKey' Color where
407+-- 'fromJSONKey' = 'genericFromJSONKey' 'defaultJSONKeyOptions'
409class FromJSONKey a where
409class FromJSONKey a where
410 -- | Strategy for parsing the key of a map-like container.
410 -- | Strategy for parsing the key of a map-like container.
411 fromJSONKey :: FromJSONKeyFunction a
411 fromJSONKey :: FromJSONKeyFunction a
@@ -428,11 +428,7 @@ class FromJSONKey a where
428-- At the moment this type is intentionally not exported. 'FromJSONKeyFunction'
428-- At the moment this type is intentionally not exported. 'FromJSONKeyFunction'
429-- can be inspected, but cannot be constructed.
429-- can be inspected, but cannot be constructed.
430data CoerceText a where
430data CoerceText a where
432 CoerceText :: Coercible Text a => CoerceText a
431 CoerceText :: Coercible Text a => CoerceText a
434− CoerceText :: CoerceText a
437-- | This type is related to 'ToJSONKeyFunction'. If 'FromJSONKeyValue' is used in the
433-- | This type is related to 'ToJSONKeyFunction'. If 'FromJSONKeyValue' is used in the
438-- 'FromJSONKey' instance, then 'ToJSONKeyValue' should be used in the 'ToJSONKey'
434-- 'FromJSONKey' instance, then 'ToJSONKeyValue' should be used in the 'ToJSONKey'
@@ -452,7 +448,7 @@ data FromJSONKeyFunction a
453-- | Only law abiding up to interpretation
449-- | Only law abiding up to interpretation
454instance Functor FromJSONKeyFunction where
450instance Functor FromJSONKeyFunction where
455− fmap h (FromJSONKeyCoerce CoerceText) = FromJSONKeyText (h . coerce')
451+ fmap h (FromJSONKeyCoerce CoerceText) = FromJSONKeyText (h . coerce)
456 fmap h (FromJSONKeyText f) = FromJSONKeyText (h . f)
452 fmap h (FromJSONKeyText f) = FromJSONKeyText (h . f)
457 fmap h (FromJSONKeyTextParser f) = FromJSONKeyTextParser (fmap h . f)
453 fmap h (FromJSONKeyTextParser f) = FromJSONKeyTextParser (fmap h . f)
458 fmap h (FromJSONKeyValue f) = FromJSONKeyValue (fmap h . f)
454 fmap h (FromJSONKeyValue f) = FromJSONKeyValue (fmap h . f)
@@ -466,9 +462,7 @@ instance Functor FromJSONKeyFunction where
467-- On pre GHC 7.8 this is unconstrainted function.
463-- On pre GHC 7.8 this is unconstrainted function.
468fromJSONKeyCoerce ::
464fromJSONKeyCoerce ::
470 Coercible Text a =>
465 Coercible Text a =>
472 FromJSONKeyFunction a
466 FromJSONKeyFunction a
473fromJSONKeyCoerce = FromJSONKeyCoerce CoerceText
467fromJSONKeyCoerce = FromJSONKeyCoerce CoerceText
@@ -476,34 +470,52 @@ fromJSONKeyCoerce = FromJSONKeyCoerce CoerceText
477-- See note on 'fromJSONKeyCoerce'.
471-- See note on 'fromJSONKeyCoerce'.
478coerceFromJSONKeyFunction ::
472coerceFromJSONKeyFunction ::
480 Coercible a b =>
473 Coercible a b =>
482 FromJSONKeyFunction a -> FromJSONKeyFunction b
474 FromJSONKeyFunction a -> FromJSONKeyFunction b
484coerceFromJSONKeyFunction = coerce
475coerceFromJSONKeyFunction = coerce
486−coerceFromJSONKeyFunction (FromJSONKeyCoerce CoerceText) = FromJSONKeyCoerce CoerceText
487−coerceFromJSONKeyFunction (FromJSONKeyText f) = FromJSONKeyText (coerce' . f)
488−coerceFromJSONKeyFunction (FromJSONKeyTextParser f) = FromJSONKeyTextParser (fmap coerce' . f)
489−coerceFromJSONKeyFunction (FromJSONKeyValue f) = FromJSONKeyValue (fmap coerce' . f)
493 "FromJSONKeyCoerce: fmap id" forall (x :: FromJSONKeyFunction a).
478 "FromJSONKeyCoerce: fmap id" forall (x :: FromJSONKeyFunction a).
494 fmap id x = x
479 fmap id x = x
498 "FromJSONKeyCoerce: fmap coerce" forall x .
482 "FromJSONKeyCoerce: fmap coerce" forall x .
499 fmap coerce x = coerceFromJSONKeyFunction x
483 fmap coerce x = coerceFromJSONKeyFunction x
503-- | Same as 'fmap'. Provided for the consistency with 'ToJSONKeyFunction'.
486-- | Same as 'fmap'. Provided for the consistency with 'ToJSONKeyFunction'.
504mapFromJSONKeyFunction :: (a -> b) -> FromJSONKeyFunction a -> FromJSONKeyFunction b
487mapFromJSONKeyFunction :: (a -> b) -> FromJSONKeyFunction a -> FromJSONKeyFunction b
505mapFromJSONKeyFunction = fmap
488mapFromJSONKeyFunction = fmap
490+-- | 'fromJSONKey' for 'Generic' types.
491+-- These types must be sums of nullary constructors, whose names will be used
492+-- as keys for JSON objects.
494+-- See also 'genericToJSONKey'.
499+-- data Color = Red | Green | Blue
500+-- deriving 'Generic'
502+-- instance 'FromJSONKey' Color where
503+-- 'fromJSONKey' = 'genericFromJSONKey' 'defaultJSONKeyOptions'
505+genericFromJSONKey :: forall a. (Generic a, GFromJSONKey (Rep a))
507+ -> FromJSONKeyFunction a
508+genericFromJSONKey opts = FromJSONKeyTextParser $ \t ->
509+ case parseSumFromString (keyModifier opts) t of
511+ "invalid key " ++ show t ++ ", expected one of " ++ show cnames
512+ Just k -> pure (to k)
514+ cnames = unTagged2 (constructorTags (keyModifier opts) :: Tagged2 (Rep a) [String])
516+class (ConstructorNames f, SumFromString f) => GFromJSONKey f where
517+instance (ConstructorNames f, SumFromString f) => GFromJSONKey f where
507-------------------------------------------------------------------------------
519-------------------------------------------------------------------------------
508-- Functions needed for documentation
520-- Functions needed for documentation
509-------------------------------------------------------------------------------
521-------------------------------------------------------------------------------
@@ -756,13 +768,13 @@ withBoundedScientific' f v = withBoundedScientific_ id f v
756-- | A variant of 'withBoundedScientific_' parameterized by a function to apply
768-- | A variant of 'withBoundedScientific_' parameterized by a function to apply
757-- to the 'Parser' in case of failure.
769-- to the 'Parser' in case of failure.
758withBoundedScientific_ :: (Parser a -> Parser a) -> (Scientific -> Parser a) -> Value -> Parser a
770withBoundedScientific_ :: (Parser a -> Parser a) -> (Scientific -> Parser a) -> Value -> Parser a
759−withBoundedScientific_ whenFail f v@(Number scientific) =
771+withBoundedScientific_ whenFail f (Number scientific) =
760− if exponent > 1024
772+ if exp10 > 1024
761 then whenFail (fail msg)
773 then whenFail (fail msg)
762 else f scientific
774 else f scientific
764− exponent = base10Exponent scientific
776+ exp10 = base10Exponent scientific
765− msg = "found a number with exponent " ++ show exponent ++ ", but it must not be greater than 1024"
777+ msg = "found a number with exponent " ++ show exp10 ++ ", but it must not be greater than 1024"
766withBoundedScientific_ whenFail _ v =
778withBoundedScientific_ whenFail _ v =
767 whenFail (typeMismatch "Number" v)
779 whenFail (typeMismatch "Number" v)
768{-# INLINE withBoundedScientific_ #-}
780{-# INLINE withBoundedScientific_ #-}
@@ -782,7 +794,7 @@ withBool name _ v = prependContext name (typeMismatch "Boolean" v)
782-- | Decode a nested JSON-encoded string.
794-- | Decode a nested JSON-encoded string.
783withEmbeddedJSON :: String -> (Value -> Parser a) -> Value -> Parser a
795withEmbeddedJSON :: String -> (Value -> Parser a) -> Value -> Parser a
784withEmbeddedJSON _ innerParser (String txt) =
796withEmbeddedJSON _ innerParser (String txt) =
785− either fail innerParser $ eitherDecode (Compat.fromStrict $ T.encodeUtf8 txt)
797+ either fail innerParser $ eitherDecode (L.fromStrict $ T.encodeUtf8 txt)
787 eitherDecode = eitherFormatError . eitherDecodeWith jsonEOF ifromJSON
799 eitherDecode = eitherFormatError . eitherDecodeWith jsonEOF ifromJSON
788 eitherFormatError = either (Left . uncurry formatError) Right
800 eitherFormatError = either (Left . uncurry formatError) Right
@@ -851,7 +863,7 @@ parseFieldMaybe' = (.:!)
851-- E.g. @'explicitParseField' 'parseJSON1' :: ('FromJSON1' f, 'FromJSON' a) -> 'Object' -> 'Text' -> 'Parser' (f a)@
863-- E.g. @'explicitParseField' 'parseJSON1' :: ('FromJSON1' f, 'FromJSON' a) -> 'Object' -> 'Text' -> 'Parser' (f a)@
852explicitParseField :: (Value -> Parser a) -> Object -> Text -> Parser a
864explicitParseField :: (Value -> Parser a) -> Object -> Text -> Parser a
853explicitParseField p obj key = case H.lookup key obj of
865explicitParseField p obj key = case H.lookup key obj of
854− Nothing -> fail $ "key " ++ show key ++ " not present"
866+ Nothing -> fail $ "key " ++ show key ++ " not found"
855 Just v -> p v <?> Key key
867 Just v -> p v <?> Key key
856{-# INLINE explicitParseField #-}
868{-# INLINE explicitParseField #-}
@@ -910,6 +922,16 @@ type ConName = String
910contextType :: TypeName -> Parser a -> Parser a
922contextType :: TypeName -> Parser a -> Parser a
911contextType = prependContext
923contextType = prependContext
925+-- | Add the tagKey that will be looked up while building an ADT
926+-- | Produce the error equivalent to
927+-- | Left "Error in $: parsing T failed, expected an object with keys "tag" and
928+-- | "contents", where "tag" i-- |s associated to one of ["Foo", "Bar"],
929+-- | The parser returned error was: could not find key "tag"
930+contextTag :: Text -> [String] -> Parser a -> Parser a
931+contextTag tagKey cnames = prependFailure
932+ ("expected Object with key \"" ++ unpack tagKey ++ "\"" ++
933+ " containing one of " ++ show cnames ++ ", ")
913-- | Add the name of the constructor being parsed to a parser's error messages.
935-- | Add the name of the constructor being parsed to a parser's error messages.
914contextCons :: ConName -> TypeName -> Parser a -> Parser a
936contextCons :: ConName -> TypeName -> Parser a -> Parser a
915contextCons cname tname = prependContext (showCons cname tname)
937contextCons cname tname = prependContext (showCons cname tname)
@@ -1020,41 +1042,46 @@ parseAllNullarySum :: (SumFromString f, ConstructorNames f)
1020parseAllNullarySum tname opts =
1042parseAllNullarySum tname opts =
1021 withText tname $ \tag ->
1043 withText tname $ \tag ->
1022 maybe (badTag tag) return $
1044 maybe (badTag tag) return $
1023− parseSumFromString opts tag
1045+ parseSumFromString modifier tag
1025− badTag tag = failWithCTags tname opts $ \cnames ->
1047+ badTag tag = failWithCTags tname modifier $ \cnames ->
1026 "expected one of the tags " ++ show cnames ++
1048 "expected one of the tags " ++ show cnames ++
1027 ", but found tag " ++ show tag
1049 ", but found tag " ++ show tag
1050+ modifier = constructorTagModifier opts
1029-- | Fail with an informative error message about a mismatched tag.
1052-- | Fail with an informative error message about a mismatched tag.
1030-- The error message is parameterized by the list of expected tags,
1053-- The error message is parameterized by the list of expected tags,
1031-- to be inferred from the result type of the parser.
1054-- to be inferred from the result type of the parser.
1032failWithCTags
1055failWithCTags
1033− :: forall f a. ConstructorNames f
1056+ :: forall f a t. ConstructorNames f
1034− => TypeName -> Options -> ([String] -> String) -> Parser (f a)
1057+ => TypeName -> (String -> t) -> ([t] -> String) -> Parser (f a)
1035−failWithCTags tname opts f =
1058+failWithCTags tname modifier f =
1036 contextType tname . fail $ f cnames
1059 contextType tname . fail $ f cnames
1038− cnames = unTagged2 (constructorTags opts :: Tagged2 f [String])
1061+ cnames = unTagged2 (constructorTags modifier :: Tagged2 f [t])
1040class SumFromString f where
1063class SumFromString f where
1041− parseSumFromString :: Options -> Text -> Maybe (f a)
1064+ parseSumFromString :: (String -> String) -> Text -> Maybe (f a)
1043instance (SumFromString a, SumFromString b) => SumFromString (a :+: b) where
1066instance (SumFromString a, SumFromString b) => SumFromString (a :+: b) where
1044 parseSumFromString opts key = (L1 <$> parseSumFromString opts key) <|>
1067 parseSumFromString opts key = (L1 <$> parseSumFromString opts key) <|>
1045 (R1 <$> parseSumFromString opts key)
1068 (R1 <$> parseSumFromString opts key)
1047instance (Constructor c) => SumFromString (C1 c U1) where
1070instance (Constructor c) => SumFromString (C1 c U1) where
1048− parseSumFromString opts key | key == name = Just $ M1 U1
1071+ parseSumFromString modifier key
1072+ | key == name = Just $ M1 U1
1049− | otherwise = Nothing
1073+ | otherwise = Nothing
1051− name = pack $ constructorTagModifier opts $
1052− conName (undefined :: M1 _i c _f _p)
1075+ name = pack $ modifier $ conName (undefined :: M1 _i c _f _p)
1077+-- For genericFromJSONKey
1078+instance SumFromString a => SumFromString (D1 d a) where
1079+ parseSumFromString modifier key = M1 <$> parseSumFromString modifier key
1054-- | List of all constructor tags.
1081-- | List of all constructor tags.
1055−constructorTags :: ConstructorNames a => Options -> Tagged2 a [String]
1082+constructorTags :: ConstructorNames a => (String -> t) -> Tagged2 a [t]
1056−constructorTags opts =
1083+constructorTags modifier =
1057− fmap DList.toList (constructorNames' (constructorTagModifier opts))
1084+ fmap DList.toList (constructorNames' modifier)
1059-- | List of all constructor names of an ADT, after a given conversion
1086-- | List of all constructor names of an ADT, after a given conversion
1060-- function. (Better inlining.)
1087-- function. (Better inlining.)
@@ -1075,9 +1102,16 @@ instance Constructor c => ConstructorNames (C1 c a) where
1076 cname = conName (undefined :: M1 _i c _f _p)
1103 cname = conName (undefined :: M1 _i c _f _p)
1078−--------------------------------------------------------------------------------
1105+-- For genericFromJSONKey
1106+instance ConstructorNames a => ConstructorNames (D1 d a) where
1107+ constructorNames' = retag . constructorNames'
1109+ retag :: Tagged2 a u -> Tagged2 (D1 d a) u
1110+ retag (Tagged2 x) = Tagged2 x
1112+--------------------------------------------------------------------------------
1080−parseNonAllNullarySum :: ( FromPair arity f
1113+parseNonAllNullarySum :: forall f c arity.
1081 , FromTaggedObject arity f
1115 , FromTaggedObject arity f
1082 , FromUntaggedValue arity f
1116 , FromUntaggedValue arity f
1083 , ConstructorNames f
1117 , ConstructorNames f
@@ -1087,7 +1121,7 @@ parseNonAllNullarySum p@(tname :* opts :* _) =
1087 case sumEncoding opts of
1121 case sumEncoding opts of
1088 TaggedObject{..} ->
1122 TaggedObject{..} ->
1089 withObject tname $ \obj -> do
1123 withObject tname $ \obj -> do
1090− tag <- contextType tname $ obj .: tagKey
1124+ tag <- contextType tname . contextTag tagKey cnames_ $ obj .: tagKey
1091 fromMaybe (badTag tag <?> Key tagKey) $
1125 fromMaybe (badTag tag <?> Key tagKey) $
1092 parseFromTaggedObject (tag :* contentsFieldName :* p) obj
1126 parseFromTaggedObject (tag :* contentsFieldName :* p) obj
@@ -1095,6 +1129,7 @@ parseNonAllNullarySum p@(tname :* opts :* _) =
1095 badTag tag = failWith_ $ \cnames ->
1129 badTag tag = failWith_ $ \cnames ->
1096 "expected tag field to be one of " ++ show cnames ++
1130 "expected tag field to be one of " ++ show cnames ++
1097 ", but found tag " ++ show tag
1131 ", but found tag " ++ show tag
1132+ cnames_ = unTagged2 (constructorTags (constructorTagModifier opts) :: Tagged2 f [String])
1099 ObjectWithSingleField ->
1134 ObjectWithSingleField ->
1100 withObject tname $ \obj -> case H.toList obj of
1135 withObject tname $ \obj -> case H.toList obj of
@@ -1126,7 +1161,7 @@ parseNonAllNullarySum p@(tname :* opts :* _) =
1127 UntaggedValue -> parseUntaggedValue p
1162 UntaggedValue -> parseUntaggedValue p
1129− failWith_ = failWithCTags tname opts
1164+ failWith_ = failWithCTags tname (constructorTagModifier opts)
1131--------------------------------------------------------------------------------
1166--------------------------------------------------------------------------------
@@ -1166,9 +1201,9 @@ class FromTaggedObject' arity f isRecord where
1166 :: String :* ConName :* TypeName :* Options :* FromArgs arity a
1201 :: String :* ConName :* TypeName :* Options :* FromArgs arity a
1167 -> Object -> Tagged isRecord (Parser (f a))
1202 -> Object -> Tagged isRecord (Parser (f a))
1169−instance (RecordFromJSON arity f) => FromTaggedObject' arity f True where
1204+instance (RecordFromJSON arity f, FieldNames f) => FromTaggedObject' arity f True where
1170 -- Records are unpacked in the tagged object
1205 -- Records are unpacked in the tagged object
1171− parseFromTaggedObject' (_ :* p) = Tagged . recordParseJSON p
1206+ parseFromTaggedObject' (_ :* p) = Tagged . recordParseJSON (True :* p)
1173instance (ConsFromJSON arity f) => FromTaggedObject' arity f False where
1208instance (ConsFromJSON arity f) => FromTaggedObject' arity f False where
1174 -- Nonnullary nonrecords are encoded in the contents field
1209 -- Nonnullary nonrecords are encoded in the contents field
@@ -1209,11 +1244,11 @@ instance OVERLAPPING_
1209 ) => ConsFromJSON' arity (S1 s a) True where
1244 ) => ConsFromJSON' arity (S1 s a) True where
1210 consParseJSON' p@(cname :* tname :* opts :* fargs)
1245 consParseJSON' p@(cname :* tname :* opts :* fargs)
1211 | unwrapUnaryRecords opts = Tagged . fmap M1 . gParseJSON opts fargs
1246 | unwrapUnaryRecords opts = Tagged . fmap M1 . gParseJSON opts fargs
1212− | otherwise = Tagged . withObject (showCons cname tname) (recordParseJSON p)
1247+ | otherwise = Tagged . withObject (showCons cname tname) (recordParseJSON (False :* p))
1214instance RecordFromJSON arity f => ConsFromJSON' arity f True where
1249instance RecordFromJSON arity f => ConsFromJSON' arity f True where
1215 consParseJSON' p@(cname :* tname :* _) =
1250 consParseJSON' p@(cname :* tname :* _) =
1216− Tagged . withObject (showCons cname tname) (recordParseJSON p)
1251+ Tagged . withObject (showCons cname tname) (recordParseJSON (False :* p))
1218instance OVERLAPPING_
1253instance OVERLAPPING_
1219 ConsFromJSON' arity U1 False where
1254 ConsFromJSON' arity U1 False where
@@ -1239,21 +1274,55 @@ instance (ProductFromJSON arity f, ProductSize f
1240--------------------------------------------------------------------------------
1275--------------------------------------------------------------------------------
1277+class FieldNames f where
1278+ fieldNames :: f a -> [Text] -> [Text]
1280+instance (FieldNames a, FieldNames b) => FieldNames (a :*: b) where
1282+ fieldNames (undefined :: a x) .
1283+ fieldNames (undefined :: b y)
1285+instance (Selector s) => FieldNames (S1 s f) where
1286+ fieldNames _ = (pack (selName (undefined :: M1 _i s _f _p)) :)
1242class RecordFromJSON arity f where
1288class RecordFromJSON arity f where
1243 recordParseJSON
1289 recordParseJSON
1290+ :: Bool :* ConName :* TypeName :* Options :* FromArgs arity a
1291+ -> Object -> Parser (f a)
1293+instance ( FieldNames f
1294+ , RecordFromJSON' arity f
1295+ ) => RecordFromJSON arity f where
1296+ recordParseJSON (fromTaggedSum :* p@(cname :* tname :* opts :* _)) =
1297+ \obj -> checkUnknown obj >> recordParseJSON' p obj
1299+ knownFields :: H.HashMap Text ()
1300+ knownFields = H.fromList $ map (,()) $
1301+ fieldNames (undefined :: f a)
1302+ [pack (tagFieldName (sumEncoding opts)) | fromTaggedSum]
1304+ if not (rejectUnknownFields opts)
1305+ then \_ -> return ()
1306+ else \obj -> case H.keys (H.difference obj knownFields) of
1308+ unknownFields -> contextCons cname tname $
1309+ fail ("unknown fields: " ++ show unknownFields)
1311+class RecordFromJSON' arity f where
1244 :: ConName :* TypeName :* Options :* FromArgs arity a
1313 :: ConName :* TypeName :* Options :* FromArgs arity a
1245 -> Object -> Parser (f a)
1314 -> Object -> Parser (f a)
1247−instance ( RecordFromJSON arity a
1316+instance ( RecordFromJSON' arity a
1248− , RecordFromJSON arity b
1317+ , RecordFromJSON' arity b
1249− ) => RecordFromJSON arity (a :*: b) where
1318+ ) => RecordFromJSON' arity (a :*: b) where
1250− recordParseJSON p obj =
1319+ recordParseJSON' p obj =
1251− (:*:) <$> recordParseJSON p obj
1320+ (:*:) <$> recordParseJSON' p obj
1252− <*> recordParseJSON p obj
1321+ <*> recordParseJSON' p obj
1254instance OVERLAPPABLE_ (Selector s, GFromJSON arity a) =>
1323instance OVERLAPPABLE_ (Selector s, GFromJSON arity a) =>
1255− RecordFromJSON arity (S1 s a) where
1324+ RecordFromJSON' arity (S1 s a) where
1256− recordParseJSON (cname :* tname :* opts :* fargs) obj = do
1325+ recordParseJSON' (cname :* tname :* opts :* fargs) obj = do
1257 fv <- contextCons cname tname (obj .: label)
1326 fv <- contextCons cname tname (obj .: label)
1258 M1 <$> gParseJSON opts fargs fv <?> Key label
1327 M1 <$> gParseJSON opts fargs fv <?> Key label
@@ -1261,16 +1330,16 @@ instance OVERLAPPABLE_ (Selector s, GFromJSON arity a) =>
1261 sname = selName (undefined :: M1 _i s _f _p)
1330 sname = selName (undefined :: M1 _i s _f _p)
1263instance INCOHERENT_ (Selector s, FromJSON a) =>
1332instance INCOHERENT_ (Selector s, FromJSON a) =>
1264− RecordFromJSON arity (S1 s (K1 i (Maybe a))) where
1333+ RecordFromJSON' arity (S1 s (K1 i (Maybe a))) where
1265− recordParseJSON (_ :* _ :* opts :* _) obj = M1 . K1 <$> obj .:? pack label
1334+ recordParseJSON' (_ :* _ :* opts :* _) obj = M1 . K1 <$> obj .:? pack label
1267 label = fieldLabelModifier opts sname
1336 label = fieldLabelModifier opts sname
1268 sname = selName (undefined :: M1 _i s _f _p)
1337 sname = selName (undefined :: M1 _i s _f _p)
1270-- Parse an Option like a Maybe.
1339-- Parse an Option like a Maybe.
1271instance INCOHERENT_ (Selector s, FromJSON a) =>
1340instance INCOHERENT_ (Selector s, FromJSON a) =>
1272− RecordFromJSON arity (S1 s (K1 i (Semigroup.Option a))) where
1341+ RecordFromJSON' arity (S1 s (K1 i (Semigroup.Option a))) where
1273− recordParseJSON p obj = wrap <$> recordParseJSON p obj
1342+ recordParseJSON' p obj = wrap <$> recordParseJSON' p obj
1275 wrap :: S1 s (K1 i (Maybe a)) p -> S1 s (K1 i (Semigroup.Option a)) p
1344 wrap :: S1 s (K1 i (Maybe a)) p -> S1 s (K1 i (Semigroup.Option a)) p
1276 wrap (M1 (K1 a)) = M1 (K1 (Semigroup.Option a))
1345 wrap (M1 (K1 a)) = M1 (K1 (Semigroup.Option a))
@@ -1507,12 +1576,22 @@ instance FromJSONKey Float where
1507 _ -> Scientific.toRealFloat <$> parseScientificText t
1576 _ -> Scientific.toRealFloat <$> parseScientificText t
1509instance (FromJSON a, Integral a) => FromJSON (Ratio a) where
1578instance (FromJSON a, Integral a) => FromJSON (Ratio a) where
1579+ parseJSON (Number x)
1581+ , exp10 >= -1024 = return $! realToFrac x
1582+ | otherwise = prependContext "Ratio" $ fail msg
1584+ exp10 = base10Exponent x
1585+ msg = "found a number with exponent " ++ show exp10
1586+ ++ ", but it must not be greater than 1024 or less than -1024"
1587+ parseJSON o = objParser o
1510− parseJSON = withObject "Rational" $ \obj -> do
1589+ objParser = withObject "Rational" $ \obj -> do
1511− numerator <- obj .: "numerator"
1590+ numerator <- obj .: "numerator"
1512− denominator <- obj .: "denominator"
1591+ denominator <- obj .: "denominator"
1513− if denominator == 0
1592+ if denominator == 0
1514− then fail "Ratio denominator was 0"
1593+ then fail "Ratio denominator was 0"
1515− else pure $ numerator % denominator
1594+ else pure $ numerator % denominator
1516 {-# INLINE parseJSON #-}
1595 {-# INLINE parseJSON #-}
1518-- | This instance includes a bounds check to prevent maliciously
1597-- | This instance includes a bounds check to prevent maliciously
@@ -1663,7 +1742,7 @@ instance FromJSON1 NonEmpty where
1663 liftParseJSON p _ = withArray "NonEmpty" $
1742 liftParseJSON p _ = withArray "NonEmpty" $
1664 (>>= ne) . Tr.sequence . zipWith (parseIndexedJSON p) [0..] . V.toList
1743 (>>= ne) . Tr.sequence . zipWith (parseIndexedJSON p) [0..] . V.toList
1666− ne [] = fail "parsing NonEmpty failed, unpexpected empty list"
1745+ ne [] = fail "parsing NonEmpty failed, unexpected empty list"
1667 ne (x:xs) = pure (x :| xs)
1746 ne (x:xs) = pure (x :| xs)
1668 {-# INLINE liftParseJSON #-}
1747 {-# INLINE liftParseJSON #-}
@@ -1927,7 +2006,6 @@ instance FromJSON DotNetTime where
1927-- primitive
2006-- primitive
1928-------------------------------------------------------------------------------
2007-------------------------------------------------------------------------------
1930−#if MIN_VERSION_base(4,7,0)
1931instance FromJSON a => FromJSON (PM.Array a) where
2009instance FromJSON a => FromJSON (PM.Array a) where
1932 -- note: we could do better than this if vector exposed the data
2010 -- note: we could do better than this if vector exposed the data
1933 -- constructor in Data.Vector.
2011 -- constructor in Data.Vector.
@@ -1945,7 +2023,6 @@ instance (PM.PrimUnlifted a,FromJSON a) => FromJSON (PM.UnliftedArray a) where
1945 parseJSON = fmap Exts.fromList . parseJSON
2023 parseJSON = fmap Exts.fromList . parseJSON
1950-------------------------------------------------------------------------------
2027-------------------------------------------------------------------------------