@@ -7,16 +7,14 @@
7{-# LANGUAGE MultiParamTypeClasses #-}
7{-# LANGUAGE MultiParamTypeClasses #-}
8{-# LANGUAGE NoImplicitPrelude #-}
8{-# LANGUAGE NoImplicitPrelude #-}
9{-# LANGUAGE OverloadedStrings #-}
9{-# LANGUAGE OverloadedStrings #-}
10+{-# LANGUAGE PolyKinds #-}
10{-# LANGUAGE RecordWildCards #-}
11{-# LANGUAGE RecordWildCards #-}
11{-# LANGUAGE ScopedTypeVariables #-}
12{-# LANGUAGE ScopedTypeVariables #-}
12{-# LANGUAGE TypeOperators #-}
13{-# LANGUAGE TypeOperators #-}
14+{-# LANGUAGE TupleSections #-}
13{-# LANGUAGE UndecidableInstances #-}
15{-# LANGUAGE UndecidableInstances #-}
14{-# LANGUAGE ViewPatterns #-}
16{-# LANGUAGE ViewPatterns #-}
16−#if __GLASGOW_HASKELL__ >= 706
17−{-# LANGUAGE PolyKinds #-}
20#include "incoherent-compat.h"
18#include "incoherent-compat.h"
21#include "overlapping-compat.h"
19#include "overlapping-compat.h"
@@ -120,9 +118,9 @@ import GHC.Generics
120import Numeric.Natural (Natural)
118import Numeric.Natural (Natural)
121import Text.ParserCombinators.ReadP (readP_to_S)
119import Text.ParserCombinators.ReadP (readP_to_S)
122import Unsafe.Coerce (unsafeCoerce)
120import Unsafe.Coerce (unsafeCoerce)
123−import qualified Data.Aeson.Compat as Compat
124import qualified Data.Aeson.Parser.Time as Time
121import qualified Data.Aeson.Parser.Time as Time
125import 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
126import qualified Data.DList as DList
124import qualified Data.DList as DList
127import qualified Data.HashMap.Strict as H
125import qualified Data.HashMap.Strict as H
128import qualified Data.HashSet as HashSet
126import qualified Data.HashSet as HashSet
@@ -157,18 +155,8 @@ import qualified Data.Primitive.UnliftedArray as PM
157import qualified Data.Primitive.PrimArray as PM
155import qualified Data.Primitive.PrimArray as PM
160−#ifndef HAS_COERCIBLE
161−#define HAS_COERCIBLE (__GLASGOW_HASKELL__ >= 707)
165import Data.Coerce (Coercible, coerce)
159import Data.Coerce (Coercible, coerce)
166−coerce' :: Coercible a b => a -> b
170−coerce' = unsafeCoerce
173parseIndexedJSON :: (Value -> Parser a) -> Int -> Value -> Parser a
161parseIndexedJSON :: (Value -> Parser a) -> Int -> Value -> Parser a
174parseIndexedJSON p idx value = p value <?> Index idx
162parseIndexedJSON p idx value = p value <?> Index idx
@@ -440,11 +428,7 @@ class FromJSONKey a where
440-- At the moment this type is intentionally not exported. 'FromJSONKeyFunction'
428-- At the moment this type is intentionally not exported. 'FromJSONKeyFunction'
441-- can be inspected, but cannot be constructed.
429-- can be inspected, but cannot be constructed.
442data CoerceText a where
430data CoerceText a where
444 CoerceText :: Coercible Text a => CoerceText a
431 CoerceText :: Coercible Text a => CoerceText a
446− CoerceText :: CoerceText a
449-- | 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
450-- 'FromJSONKey' instance, then 'ToJSONKeyValue' should be used in the 'ToJSONKey'
434-- 'FromJSONKey' instance, then 'ToJSONKeyValue' should be used in the 'ToJSONKey'
@@ -464,7 +448,7 @@ data FromJSONKeyFunction a
465-- | Only law abiding up to interpretation
449-- | Only law abiding up to interpretation
466instance Functor FromJSONKeyFunction where
450instance Functor FromJSONKeyFunction where
467− fmap h (FromJSONKeyCoerce CoerceText) = FromJSONKeyText (h . coerce')
451+ fmap h (FromJSONKeyCoerce CoerceText) = FromJSONKeyText (h . coerce)
468 fmap h (FromJSONKeyText f) = FromJSONKeyText (h . f)
452 fmap h (FromJSONKeyText f) = FromJSONKeyText (h . f)
469 fmap h (FromJSONKeyTextParser f) = FromJSONKeyTextParser (fmap h . f)
453 fmap h (FromJSONKeyTextParser f) = FromJSONKeyTextParser (fmap h . f)
470 fmap h (FromJSONKeyValue f) = FromJSONKeyValue (fmap h . f)
454 fmap h (FromJSONKeyValue f) = FromJSONKeyValue (fmap h . f)
@@ -478,9 +462,7 @@ instance Functor FromJSONKeyFunction where
479-- On pre GHC 7.8 this is unconstrainted function.
463-- On pre GHC 7.8 this is unconstrainted function.
480fromJSONKeyCoerce ::
464fromJSONKeyCoerce ::
482 Coercible Text a =>
465 Coercible Text a =>
484 FromJSONKeyFunction a
466 FromJSONKeyFunction a
485fromJSONKeyCoerce = FromJSONKeyCoerce CoerceText
467fromJSONKeyCoerce = FromJSONKeyCoerce CoerceText
@@ -488,29 +470,18 @@ fromJSONKeyCoerce = FromJSONKeyCoerce CoerceText
489-- See note on 'fromJSONKeyCoerce'.
471-- See note on 'fromJSONKeyCoerce'.
490coerceFromJSONKeyFunction ::
472coerceFromJSONKeyFunction ::
492 Coercible a b =>
473 Coercible a b =>
494 FromJSONKeyFunction a -> FromJSONKeyFunction b
474 FromJSONKeyFunction a -> FromJSONKeyFunction b
496coerceFromJSONKeyFunction = coerce
475coerceFromJSONKeyFunction = coerce
498−coerceFromJSONKeyFunction (FromJSONKeyCoerce CoerceText) = FromJSONKeyCoerce CoerceText
499−coerceFromJSONKeyFunction (FromJSONKeyText f) = FromJSONKeyText (coerce' . f)
500−coerceFromJSONKeyFunction (FromJSONKeyTextParser f) = FromJSONKeyTextParser (fmap coerce' . f)
501−coerceFromJSONKeyFunction (FromJSONKeyValue f) = FromJSONKeyValue (fmap coerce' . f)
505 "FromJSONKeyCoerce: fmap id" forall (x :: FromJSONKeyFunction a).
478 "FromJSONKeyCoerce: fmap id" forall (x :: FromJSONKeyFunction a).
506 fmap id x = x
479 fmap id x = x
510 "FromJSONKeyCoerce: fmap coerce" forall x .
482 "FromJSONKeyCoerce: fmap coerce" forall x .
511 fmap coerce x = coerceFromJSONKeyFunction x
483 fmap coerce x = coerceFromJSONKeyFunction x
515-- | Same as 'fmap'. Provided for the consistency with 'ToJSONKeyFunction'.
486-- | Same as 'fmap'. Provided for the consistency with 'ToJSONKeyFunction'.
516mapFromJSONKeyFunction :: (a -> b) -> FromJSONKeyFunction a -> FromJSONKeyFunction b
487mapFromJSONKeyFunction :: (a -> b) -> FromJSONKeyFunction a -> FromJSONKeyFunction b
@@ -797,13 +768,13 @@ withBoundedScientific' f v = withBoundedScientific_ id f v
797-- | A variant of 'withBoundedScientific_' parameterized by a function to apply
768-- | A variant of 'withBoundedScientific_' parameterized by a function to apply
798-- to the 'Parser' in case of failure.
769-- to the 'Parser' in case of failure.
799withBoundedScientific_ :: (Parser a -> Parser a) -> (Scientific -> Parser a) -> Value -> Parser a
770withBoundedScientific_ :: (Parser a -> Parser a) -> (Scientific -> Parser a) -> Value -> Parser a
800−withBoundedScientific_ whenFail f v@(Number scientific) =
771+withBoundedScientific_ whenFail f (Number scientific) =
801− if exponent > 1024
772+ if exp10 > 1024
802 then whenFail (fail msg)
773 then whenFail (fail msg)
803 else f scientific
774 else f scientific
805− exponent = base10Exponent scientific
776+ exp10 = base10Exponent scientific
806− 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"
807withBoundedScientific_ whenFail _ v =
778withBoundedScientific_ whenFail _ v =
808 whenFail (typeMismatch "Number" v)
779 whenFail (typeMismatch "Number" v)
809{-# INLINE withBoundedScientific_ #-}
780{-# INLINE withBoundedScientific_ #-}
@@ -823,7 +794,7 @@ withBool name _ v = prependContext name (typeMismatch "Boolean" v)
823-- | Decode a nested JSON-encoded string.
794-- | Decode a nested JSON-encoded string.
824withEmbeddedJSON :: String -> (Value -> Parser a) -> Value -> Parser a
795withEmbeddedJSON :: String -> (Value -> Parser a) -> Value -> Parser a
825withEmbeddedJSON _ innerParser (String txt) =
796withEmbeddedJSON _ innerParser (String txt) =
826− either fail innerParser $ eitherDecode (Compat.fromStrict $ T.encodeUtf8 txt)
797+ either fail innerParser $ eitherDecode (L.fromStrict $ T.encodeUtf8 txt)
828 eitherDecode = eitherFormatError . eitherDecodeWith jsonEOF ifromJSON
799 eitherDecode = eitherFormatError . eitherDecodeWith jsonEOF ifromJSON
829 eitherFormatError = either (Left . uncurry formatError) Right
800 eitherFormatError = either (Left . uncurry formatError) Right
@@ -892,7 +863,7 @@ parseFieldMaybe' = (.:!)
892-- 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)@
893explicitParseField :: (Value -> Parser a) -> Object -> Text -> Parser a
864explicitParseField :: (Value -> Parser a) -> Object -> Text -> Parser a
894explicitParseField p obj key = case H.lookup key obj of
865explicitParseField p obj key = case H.lookup key obj of
895− Nothing -> fail $ "key " ++ show key ++ " not present"
866+ Nothing -> fail $ "key " ++ show key ++ " not found"
896 Just v -> p v <?> Key key
867 Just v -> p v <?> Key key
897{-# INLINE explicitParseField #-}
868{-# INLINE explicitParseField #-}
@@ -951,6 +922,16 @@ type ConName = String
951contextType :: TypeName -> Parser a -> Parser a
922contextType :: TypeName -> Parser a -> Parser a
952contextType = 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 ++ ", ")
954-- | 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.
955contextCons :: ConName -> TypeName -> Parser a -> Parser a
936contextCons :: ConName -> TypeName -> Parser a -> Parser a
956contextCons cname tname = prependContext (showCons cname tname)
937contextCons cname tname = prependContext (showCons cname tname)
@@ -1129,8 +1110,8 @@ instance ConstructorNames a => ConstructorNames (D1 d a) where
1129 retag (Tagged2 x) = Tagged2 x
1110 retag (Tagged2 x) = Tagged2 x
1131--------------------------------------------------------------------------------
1112--------------------------------------------------------------------------------
1133−parseNonAllNullarySum :: ( FromPair arity f
1113+parseNonAllNullarySum :: forall f c arity.
1134 , FromTaggedObject arity f
1115 , FromTaggedObject arity f
1135 , FromUntaggedValue arity f
1116 , FromUntaggedValue arity f
1136 , ConstructorNames f
1117 , ConstructorNames f
@@ -1140,7 +1121,7 @@ parseNonAllNullarySum p@(tname :* opts :* _) =
1140 case sumEncoding opts of
1121 case sumEncoding opts of
1141 TaggedObject{..} ->
1122 TaggedObject{..} ->
1142 withObject tname $ \obj -> do
1123 withObject tname $ \obj -> do
1143− tag <- contextType tname $ obj .: tagKey
1124+ tag <- contextType tname . contextTag tagKey cnames_ $ obj .: tagKey
1144 fromMaybe (badTag tag <?> Key tagKey) $
1125 fromMaybe (badTag tag <?> Key tagKey) $
1145 parseFromTaggedObject (tag :* contentsFieldName :* p) obj
1126 parseFromTaggedObject (tag :* contentsFieldName :* p) obj
@@ -1148,6 +1129,7 @@ parseNonAllNullarySum p@(tname :* opts :* _) =
1148 badTag tag = failWith_ $ \cnames ->
1129 badTag tag = failWith_ $ \cnames ->
1149 "expected tag field to be one of " ++ show cnames ++
1130 "expected tag field to be one of " ++ show cnames ++
1150 ", but found tag " ++ show tag
1131 ", but found tag " ++ show tag
1132+ cnames_ = unTagged2 (constructorTags (constructorTagModifier opts) :: Tagged2 f [String])
1152 ObjectWithSingleField ->
1134 ObjectWithSingleField ->
1153 withObject tname $ \obj -> case H.toList obj of
1135 withObject tname $ \obj -> case H.toList obj of
@@ -1219,9 +1201,9 @@ class FromTaggedObject' arity f isRecord where
1219 :: String :* ConName :* TypeName :* Options :* FromArgs arity a
1201 :: String :* ConName :* TypeName :* Options :* FromArgs arity a
1220 -> Object -> Tagged isRecord (Parser (f a))
1202 -> Object -> Tagged isRecord (Parser (f a))
1222−instance (RecordFromJSON arity f) => FromTaggedObject' arity f True where
1204+instance (RecordFromJSON arity f, FieldNames f) => FromTaggedObject' arity f True where
1223 -- Records are unpacked in the tagged object
1205 -- Records are unpacked in the tagged object
1224− parseFromTaggedObject' (_ :* p) = Tagged . recordParseJSON p
1206+ parseFromTaggedObject' (_ :* p) = Tagged . recordParseJSON (True :* p)
1226instance (ConsFromJSON arity f) => FromTaggedObject' arity f False where
1208instance (ConsFromJSON arity f) => FromTaggedObject' arity f False where
1227 -- Nonnullary nonrecords are encoded in the contents field
1209 -- Nonnullary nonrecords are encoded in the contents field
@@ -1262,11 +1244,11 @@ instance OVERLAPPING_
1262 ) => ConsFromJSON' arity (S1 s a) True where
1244 ) => ConsFromJSON' arity (S1 s a) True where
1263 consParseJSON' p@(cname :* tname :* opts :* fargs)
1245 consParseJSON' p@(cname :* tname :* opts :* fargs)
1264 | unwrapUnaryRecords opts = Tagged . fmap M1 . gParseJSON opts fargs
1246 | unwrapUnaryRecords opts = Tagged . fmap M1 . gParseJSON opts fargs
1265− | otherwise = Tagged . withObject (showCons cname tname) (recordParseJSON p)
1247+ | otherwise = Tagged . withObject (showCons cname tname) (recordParseJSON (False :* p))
1267instance RecordFromJSON arity f => ConsFromJSON' arity f True where
1249instance RecordFromJSON arity f => ConsFromJSON' arity f True where
1268 consParseJSON' p@(cname :* tname :* _) =
1250 consParseJSON' p@(cname :* tname :* _) =
1269− Tagged . withObject (showCons cname tname) (recordParseJSON p)
1251+ Tagged . withObject (showCons cname tname) (recordParseJSON (False :* p))
1271instance OVERLAPPING_
1253instance OVERLAPPING_
1272 ConsFromJSON' arity U1 False where
1254 ConsFromJSON' arity U1 False where
@@ -1292,21 +1274,55 @@ instance (ProductFromJSON arity f, ProductSize f
1293--------------------------------------------------------------------------------
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)) :)
1295class RecordFromJSON arity f where
1288class RecordFromJSON arity f where
1296 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
1297 :: ConName :* TypeName :* Options :* FromArgs arity a
1313 :: ConName :* TypeName :* Options :* FromArgs arity a
1298 -> Object -> Parser (f a)
1314 -> Object -> Parser (f a)
1300−instance ( RecordFromJSON arity a
1316+instance ( RecordFromJSON' arity a
1301− , RecordFromJSON arity b
1317+ , RecordFromJSON' arity b
1302− ) => RecordFromJSON arity (a :*: b) where
1318+ ) => RecordFromJSON' arity (a :*: b) where
1303− recordParseJSON p obj =
1319+ recordParseJSON' p obj =
1304− (:*:) <$> recordParseJSON p obj
1320+ (:*:) <$> recordParseJSON' p obj
1305− <*> recordParseJSON p obj
1321+ <*> recordParseJSON' p obj
1307instance OVERLAPPABLE_ (Selector s, GFromJSON arity a) =>
1323instance OVERLAPPABLE_ (Selector s, GFromJSON arity a) =>
1308− RecordFromJSON arity (S1 s a) where
1324+ RecordFromJSON' arity (S1 s a) where
1309− recordParseJSON (cname :* tname :* opts :* fargs) obj = do
1325+ recordParseJSON' (cname :* tname :* opts :* fargs) obj = do
1310 fv <- contextCons cname tname (obj .: label)
1326 fv <- contextCons cname tname (obj .: label)
1311 M1 <$> gParseJSON opts fargs fv <?> Key label
1327 M1 <$> gParseJSON opts fargs fv <?> Key label
@@ -1314,16 +1330,16 @@ instance OVERLAPPABLE_ (Selector s, GFromJSON arity a) =>
1314 sname = selName (undefined :: M1 _i s _f _p)
1330 sname = selName (undefined :: M1 _i s _f _p)
1316instance INCOHERENT_ (Selector s, FromJSON a) =>
1332instance INCOHERENT_ (Selector s, FromJSON a) =>
1317− RecordFromJSON arity (S1 s (K1 i (Maybe a))) where
1333+ RecordFromJSON' arity (S1 s (K1 i (Maybe a))) where
1318− recordParseJSON (_ :* _ :* opts :* _) obj = M1 . K1 <$> obj .:? pack label
1334+ recordParseJSON' (_ :* _ :* opts :* _) obj = M1 . K1 <$> obj .:? pack label
1320 label = fieldLabelModifier opts sname
1336 label = fieldLabelModifier opts sname
1321 sname = selName (undefined :: M1 _i s _f _p)
1337 sname = selName (undefined :: M1 _i s _f _p)
1323-- Parse an Option like a Maybe.
1339-- Parse an Option like a Maybe.
1324instance INCOHERENT_ (Selector s, FromJSON a) =>
1340instance INCOHERENT_ (Selector s, FromJSON a) =>
1325− RecordFromJSON arity (S1 s (K1 i (Semigroup.Option a))) where
1341+ RecordFromJSON' arity (S1 s (K1 i (Semigroup.Option a))) where
1326− recordParseJSON p obj = wrap <$> recordParseJSON p obj
1342+ recordParseJSON' p obj = wrap <$> recordParseJSON' p obj
1328 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
1329 wrap (M1 (K1 a)) = M1 (K1 (Semigroup.Option a))
1345 wrap (M1 (K1 a)) = M1 (K1 (Semigroup.Option a))
@@ -1560,12 +1576,22 @@ instance FromJSONKey Float where
1560 _ -> Scientific.toRealFloat <$> parseScientificText t
1576 _ -> Scientific.toRealFloat <$> parseScientificText t
1562instance (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
1563− parseJSON = withObject "Rational" $ \obj -> do
1589+ objParser = withObject "Rational" $ \obj -> do
1564− numerator <- obj .: "numerator"
1590+ numerator <- obj .: "numerator"
1565− denominator <- obj .: "denominator"
1591+ denominator <- obj .: "denominator"
1566− if denominator == 0
1592+ if denominator == 0
1567− then fail "Ratio denominator was 0"
1593+ then fail "Ratio denominator was 0"
1568− else pure $ numerator % denominator
1594+ else pure $ numerator % denominator
1569 {-# INLINE parseJSON #-}
1595 {-# INLINE parseJSON #-}
1571-- | This instance includes a bounds check to prevent maliciously
1597-- | This instance includes a bounds check to prevent maliciously
@@ -1980,7 +2006,6 @@ instance FromJSON DotNetTime where
1980-- primitive
2006-- primitive
1981-------------------------------------------------------------------------------
2007-------------------------------------------------------------------------------
1983−#if MIN_VERSION_base(4,7,0)
1984instance FromJSON a => FromJSON (PM.Array a) where
2009instance FromJSON a => FromJSON (PM.Array a) where
1985 -- 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
1986 -- constructor in Data.Vector.
2011 -- constructor in Data.Vector.
@@ -1998,7 +2023,6 @@ instance (PM.PrimUnlifted a,FromJSON a) => FromJSON (PM.UnliftedArray a) where
1998 parseJSON = fmap Exts.fromList . parseJSON
2023 parseJSON = fmap Exts.fromList . parseJSON
2003-------------------------------------------------------------------------------
2027-------------------------------------------------------------------------------