{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE Arrows #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE DeriveFunctor #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE TypeSynonymInstances #-}
{-# LANGUAGE UndecidableInstances #-}
module Opaleye.Internal.MaybeFields where
import Control.Applicative hiding (optional)
import Control.Arrow (returnA, (<<<), (>>>))
import qualified Opaleye.Internal.Binary as B
import qualified Opaleye.Internal.Column as IC
import qualified Opaleye.ToFields as Constant
import qualified Opaleye.Internal.PackMap as PM
import qualified Opaleye.Internal.HaskellDB.PrimQuery as HPQ
import Opaleye.Internal.Inferrable (Inferrable(Inferrable),
runInferrable)
import qualified Opaleye.Internal.PrimQuery as PQ
import qualified Opaleye.Internal.QueryArr as IQ
import qualified Opaleye.Internal.Rebind as Rebind
import qualified Opaleye.Internal.RunQuery as RQ
import qualified Opaleye.Internal.Tag as Tag
import qualified Opaleye.Internal.Unpackspec as U
import qualified Opaleye.Internal.Values as V
import Opaleye.Select (Select, SelectArr)
import qualified Opaleye.Column
import qualified Opaleye.Field
import Opaleye.Field (Field)
import Opaleye.Internal.Operators ((.&&), (.||), (.==), restrict, not,
ifExplict, IfPP, EqPP(EqPP))
import qualified Opaleye.Internal.Lateral
import qualified Opaleye.SqlTypes
import Opaleye.SqlTypes (SqlBool, IsSqlType)
import Control.Monad (replicateM_)
import qualified Data.Profunctor as P
import qualified Data.Profunctor.Product as PP
import qualified Data.Profunctor.Product.Default as PP
import qualified Database.PostgreSQL.Simple.FromRow as PGSR
data MaybeFields fields =
MaybeFields {
MaybeFields fields -> Column SqlBool
mfPresent :: Opaleye.Column.Column Opaleye.SqlTypes.SqlBool
, MaybeFields fields -> fields
mfFields :: fields
}
deriving a -> MaybeFields b -> MaybeFields a
(a -> b) -> MaybeFields a -> MaybeFields b
(forall a b. (a -> b) -> MaybeFields a -> MaybeFields b)
-> (forall a b. a -> MaybeFields b -> MaybeFields a)
-> Functor MaybeFields
forall a b. a -> MaybeFields b -> MaybeFields a
forall a b. (a -> b) -> MaybeFields a -> MaybeFields b
forall (f :: * -> *).
(forall a b. (a -> b) -> f a -> f b)
-> (forall a b. a -> f b -> f a) -> Functor f
<$ :: a -> MaybeFields b -> MaybeFields a
$c<$ :: forall a b. a -> MaybeFields b -> MaybeFields a
fmap :: (a -> b) -> MaybeFields a -> MaybeFields b
$cfmap :: forall a b. (a -> b) -> MaybeFields a -> MaybeFields b
Functor
instance Applicative MaybeFields where
pure :: a -> MaybeFields a
pure a
fields = MaybeFields :: forall fields. Column SqlBool -> fields -> MaybeFields fields
MaybeFields { mfPresent :: Column SqlBool
mfPresent = Bool -> Field SqlBool
Opaleye.SqlTypes.sqlBool Bool
True
, mfFields :: a
mfFields = a
fields
}
MaybeFields Column SqlBool
t a -> b
f <*> :: MaybeFields (a -> b) -> MaybeFields a -> MaybeFields b
<*> MaybeFields Column SqlBool
t' a
a =
MaybeFields :: forall fields. Column SqlBool -> fields -> MaybeFields fields
MaybeFields {
mfPresent :: Column SqlBool
mfPresent = Column SqlBool
t Column SqlBool -> Column SqlBool -> Column SqlBool
.&& Column SqlBool
t'
, mfFields :: b
mfFields = a -> b
f a
a
}
instance Monad MaybeFields where
return :: a -> MaybeFields a
return = a -> MaybeFields a
forall (f :: * -> *) a. Applicative f => a -> f a
pure
MaybeFields Column SqlBool
t a
a >>= :: MaybeFields a -> (a -> MaybeFields b) -> MaybeFields b
>>= a -> MaybeFields b
f = case a -> MaybeFields b
f a
a of
MaybeFields Column SqlBool
t' b
b -> Column SqlBool -> b -> MaybeFields b
forall fields. Column SqlBool -> fields -> MaybeFields fields
MaybeFields (Column SqlBool
t Column SqlBool -> Column SqlBool -> Column SqlBool
.&& Column SqlBool
t') b
b
nothingFields :: PP.Default V.Nullspec a a => MaybeFields a
nothingFields :: MaybeFields a
nothingFields = Nullspec a a -> MaybeFields a
forall a b. Nullspec a b -> MaybeFields b
nothingFieldsExplicit Nullspec a a
forall a. Default Nullspec a a => Nullspec a a
def
where def :: PP.Default V.Nullspec a a => V.Nullspec a a
def :: Nullspec a a
def = Nullspec a a
forall (p :: * -> * -> *) a b. Default p a b => p a b
PP.def
nothingFieldsOfTypeOf :: a -> MaybeFields a
nothingFieldsOfTypeOf :: a -> MaybeFields a
nothingFieldsOfTypeOf a
a = MaybeFields :: forall fields. Column SqlBool -> fields -> MaybeFields fields
MaybeFields {
mfPresent :: Column SqlBool
mfPresent = Bool -> Field SqlBool
Opaleye.SqlTypes.sqlBool Bool
False
, mfFields :: a
mfFields = a
a
}
justFields :: a -> MaybeFields a
justFields :: a -> MaybeFields a
justFields = a -> MaybeFields a
forall (f :: * -> *) a. Applicative f => a -> f a
pure
maybeFields :: PP.Default IfPP b b => b -> (a -> b) -> MaybeFields a -> b
maybeFields :: b -> (a -> b) -> MaybeFields a -> b
maybeFields = IfPP b b -> b -> (a -> b) -> MaybeFields a -> b
forall b b' a. IfPP b b' -> b -> (a -> b) -> MaybeFields a -> b'
maybeFieldsExplicit IfPP b b
forall (p :: * -> * -> *) a b. Default p a b => p a b
PP.def
fromMaybeFields :: PP.Default IfPP b b => b -> MaybeFields b -> b
fromMaybeFields :: b -> MaybeFields b -> b
fromMaybeFields = IfPP b b -> b -> MaybeFields b -> b
forall b. IfPP b b -> b -> MaybeFields b -> b
fromMaybeFieldsExplicit IfPP b b
forall (p :: * -> * -> *) a b. Default p a b => p a b
PP.def
maybeFieldsToSelect :: SelectArr (MaybeFields a) a
maybeFieldsToSelect :: SelectArr (MaybeFields a) a
maybeFieldsToSelect = proc MaybeFields a
mf -> do
SelectArr (Column SqlBool) ()
SelectArr (Field SqlBool) ()
restrict -< MaybeFields a -> Column SqlBool
forall fields. MaybeFields fields -> Column SqlBool
mfPresent MaybeFields a
mf
SelectArr a a
forall (a :: * -> * -> *) b. Arrow a => a b b
returnA -< MaybeFields a -> a
forall fields. MaybeFields fields -> fields
mfFields MaybeFields a
mf
catMaybeFields :: SelectArr i (MaybeFields a) -> SelectArr i a
catMaybeFields :: SelectArr i (MaybeFields a) -> SelectArr i a
catMaybeFields = (SelectArr i (MaybeFields a)
-> SelectArr (MaybeFields a) a -> SelectArr i a
forall k (cat :: k -> k -> *) (a :: k) (b :: k) (c :: k).
Category cat =>
cat a b -> cat b c -> cat a c
>>> SelectArr (MaybeFields a) a
forall a. SelectArr (MaybeFields a) a
maybeFieldsToSelect)
maybeFieldsExplicit :: IfPP b b' -> b -> (a -> b) -> MaybeFields a -> b'
maybeFieldsExplicit :: IfPP b b' -> b -> (a -> b) -> MaybeFields a -> b'
maybeFieldsExplicit IfPP b b'
ifpp b
b a -> b
f MaybeFields a
mf =
IfPP b b' -> Column SqlBool -> b -> b -> b'
forall columns columns'.
IfPP columns columns'
-> Column SqlBool -> columns -> columns -> columns'
ifExplict IfPP b b'
ifpp (MaybeFields a -> Column SqlBool
forall fields. MaybeFields fields -> Column SqlBool
mfPresent MaybeFields a
mf) (a -> b
f (MaybeFields a -> a
forall fields. MaybeFields fields -> fields
mfFields MaybeFields a
mf)) b
b
fromMaybeFieldsExplicit :: IfPP b b -> b -> MaybeFields b -> b
fromMaybeFieldsExplicit :: IfPP b b -> b -> MaybeFields b -> b
fromMaybeFieldsExplicit IfPP b b
ifpp = (b -> (b -> b) -> MaybeFields b -> b)
-> (b -> b) -> b -> MaybeFields b -> b
forall a b c. (a -> b -> c) -> b -> a -> c
flip (IfPP b b -> b -> (b -> b) -> MaybeFields b -> b
forall b b' a. IfPP b b' -> b -> (a -> b) -> MaybeFields a -> b'
maybeFieldsExplicit IfPP b b
ifpp) b -> b
forall a. a -> a
id
nothingFieldsExplicit :: V.Nullspec a b -> MaybeFields b
nothingFieldsExplicit :: Nullspec a b -> MaybeFields b
nothingFieldsExplicit = b -> MaybeFields b
forall a. a -> MaybeFields a
nothingFieldsOfTypeOf (b -> MaybeFields b)
-> (Nullspec a b -> b) -> Nullspec a b -> MaybeFields b
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Nullspec a b -> b
forall a fields. Nullspec a fields -> fields
V.nullFields
traverseMaybeFields :: SelectArr a b -> SelectArr (MaybeFields a) (MaybeFields b)
traverseMaybeFields :: SelectArr a b -> SelectArr (MaybeFields a) (MaybeFields b)
traverseMaybeFields SelectArr a b
query = proc MaybeFields a
mfInput -> do
MaybeFields b
mfOutput <- SelectArr (MaybeFields a) b
-> SelectArr (MaybeFields a) (MaybeFields b)
forall i a. SelectArr i a -> SelectArr i (MaybeFields a)
optional (SelectArr a b
query SelectArr a b
-> SelectArr (MaybeFields a) a -> SelectArr (MaybeFields a) b
forall k (cat :: k -> k -> *) (b :: k) (c :: k) (a :: k).
Category cat =>
cat b c -> cat a b -> cat a c
<<< SelectArr (MaybeFields a) a
forall a. SelectArr (MaybeFields a) a
maybeFieldsToSelect) -< MaybeFields a
mfInput
SelectArr (Column SqlBool) ()
SelectArr (Field SqlBool) ()
restrict -< MaybeFields a -> Column SqlBool
forall fields. MaybeFields fields -> Column SqlBool
mfPresent MaybeFields a
mfInput Column SqlBool -> Column SqlBool -> Column SqlBool
`implies` MaybeFields b -> Column SqlBool
forall fields. MaybeFields fields -> Column SqlBool
mfPresent MaybeFields b
mfOutput
SelectArr (MaybeFields b) (MaybeFields b)
forall (a :: * -> * -> *) b. Arrow a => a b b
returnA -< Column SqlBool -> b -> MaybeFields b
forall fields. Column SqlBool -> fields -> MaybeFields fields
MaybeFields (MaybeFields a -> Column SqlBool
forall fields. MaybeFields fields -> Column SqlBool
mfPresent MaybeFields a
mfInput) (MaybeFields b -> b
forall fields. MaybeFields fields -> fields
mfFields MaybeFields b
mfOutput)
where Column SqlBool
a implies :: Column SqlBool -> Column SqlBool -> Field SqlBool
`implies` Column SqlBool
b = Field SqlBool -> Field SqlBool
Opaleye.Internal.Operators.not Column SqlBool
Field SqlBool
a Field SqlBool -> Field SqlBool -> Field SqlBool
.|| Column SqlBool
Field SqlBool
b
optional :: SelectArr i a -> SelectArr i (MaybeFields a)
optional :: SelectArr i a -> SelectArr i (MaybeFields a)
optional = (Select a -> Select (MaybeFields a))
-> SelectArr i a -> SelectArr i (MaybeFields a)
forall a b i.
(Select a -> Select b) -> SelectArr i a -> SelectArr i b
Opaleye.Internal.Lateral.laterally ((Field (Nullable SqlBool) -> a -> MaybeFields a)
-> Select a -> Select (MaybeFields a)
forall a r.
(Field (Nullable SqlBool) -> a -> r) -> Select a -> Select r
optionalInternal (Column SqlBool -> a -> MaybeFields a
forall fields. Column SqlBool -> fields -> MaybeFields fields
MaybeFields (Column SqlBool -> a -> MaybeFields a)
-> (Column (Nullable SqlBool) -> Column SqlBool)
-> Column (Nullable SqlBool)
-> a
-> MaybeFields a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Column (Nullable SqlBool) -> Column SqlBool
forall a. Column (Nullable a) -> Column SqlBool
isNotNull))
where isNotNull :: Column (Nullable a) -> Column SqlBool
isNotNull = Column SqlBool -> Column SqlBool
Field SqlBool -> Field SqlBool
Opaleye.Internal.Operators.not (Column SqlBool -> Column SqlBool)
-> (Column (Nullable a) -> Column SqlBool)
-> Column (Nullable a)
-> Column SqlBool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Column (Nullable a) -> Column SqlBool
forall a. FieldNullable a -> Field SqlBool
Opaleye.Field.isNull
optionalInternal :: (Field (Opaleye.Column.Nullable SqlBool) -> a -> r) -> Select a -> Select r
optionalInternal :: (Field (Nullable SqlBool) -> a -> r) -> Select a -> Select r
optionalInternal Field (Nullable SqlBool) -> a -> r
f = (((), Tag) -> (r, Lateral -> PrimQuery -> PrimQuery, Tag))
-> Select r
forall a b.
((a, Tag) -> (b, Lateral -> PrimQuery -> PrimQuery, Tag))
-> SelectArr a b
IQ.QueryArr ((((), Tag) -> (r, Lateral -> PrimQuery -> PrimQuery, Tag))
-> Select r)
-> (Select a
-> ((), Tag) -> (r, Lateral -> PrimQuery -> PrimQuery, Tag))
-> Select a
-> Select r
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Select a
-> ((), Tag) -> (r, Lateral -> PrimQuery -> PrimQuery, Tag)
go
where
go :: Select a
-> ((), Tag) -> (r, Lateral -> PrimQuery -> PrimQuery, Tag)
go Select a
query ((), Tag)
arg = (r
r, Lateral -> PrimQuery -> PrimQuery
join, Tag -> Tag
Tag.next Tag
tag')
where
(r
r, PrimQuery
right, Tag
tag') = (Select r -> ((), Tag) -> (r, PrimQuery, Tag))
-> ((), Tag) -> Select r -> (r, PrimQuery, Tag)
forall a b c. (a -> b -> c) -> b -> a -> c
flip Select r -> ((), Tag) -> (r, PrimQuery, Tag)
forall a b. QueryArr a b -> (a, Tag) -> (b, PrimQuery, Tag)
IQ.runSimpleQueryArr ((), Tag)
arg (Select r -> (r, PrimQuery, Tag))
-> Select r -> (r, PrimQuery, Tag)
forall a b. (a -> b) -> a -> b
$ proc () -> do
a
a <- Select a
query -< ()
Column (Nullable SqlBool)
true_ <- SelectArr (Column (Nullable SqlBool)) (Column (Nullable SqlBool))
forall a. Default Unpackspec a a => SelectArr a a
Rebind.rebind -< Column SqlBool -> Column (Nullable SqlBool)
forall a. Column a -> Column (Nullable a)
Opaleye.Column.toNullable (PrimExpr -> Column SqlBool
forall pgType. PrimExpr -> Column pgType
IC.Column PrimExpr
true)
SelectArr r r
forall (a :: * -> * -> *) b. Arrow a => a b b
returnA -< Field (Nullable SqlBool) -> a -> r
f Column (Nullable SqlBool)
Field (Nullable SqlBool)
true_ a
a
join :: Lateral -> PrimQuery -> PrimQuery
join Lateral
lat PrimQuery
left = JoinType
-> PrimExpr
-> (Lateral, PrimQuery)
-> (Lateral, PrimQuery)
-> PrimQuery
forall a.
JoinType
-> PrimExpr
-> (Lateral, PrimQuery' a)
-> (Lateral, PrimQuery' a)
-> PrimQuery' a
PQ.Join JoinType
PQ.LeftJoin PrimExpr
true (Lateral
PQ.NonLateral, PrimQuery
left) (Lateral
lat, PrimQuery
right)
true :: PrimExpr
true = Literal -> PrimExpr
HPQ.ConstExpr (Bool -> Literal
HPQ.BoolLit Bool
True)
lateralLeftJoinOptional :: SelectArr i a
-> SelectArr i b
-> ((a, b) -> Opaleye.Field.Field Opaleye.SqlTypes.SqlBool)
-> SelectArr i (a, MaybeFields b)
lateralLeftJoinOptional :: SelectArr i a
-> SelectArr i b
-> ((a, b) -> Field SqlBool)
-> SelectArr i (a, MaybeFields b)
lateralLeftJoinOptional SelectArr i a
fieldsL SelectArr i b
fieldsR (a, b) -> Field SqlBool
cond = proc i
i -> do
a
fieldsL' <- SelectArr i a
fieldsL -< i
i
MaybeFields b
maybeFieldsR' <- SelectArr (a, i) b -> SelectArr (a, i) (MaybeFields b)
forall i a. SelectArr i a -> SelectArr i (MaybeFields a)
optional (proc (a
fieldsL', i
i) -> do
b
fieldsR' <- SelectArr i b
fieldsR -< i
i
SelectArr (Column SqlBool) ()
SelectArr (Field SqlBool) ()
restrict -< (a, b) -> Field SqlBool
cond (a
fieldsL', b
fieldsR')
SelectArr b b
forall (a :: * -> * -> *) b. Arrow a => a b b
returnA -< b
fieldsR'
) -< (a
fieldsL', i
i)
SelectArr (a, MaybeFields b) (a, MaybeFields b)
forall (a :: * -> * -> *) b. Arrow a => a b b
returnA -< (a
fieldsL', MaybeFields b
maybeFieldsR')
optionalRestrictOptional :: Select a
-> SelectArr (a -> Field SqlBool) (MaybeFields a)
optionalRestrictOptional :: Select a -> SelectArr (a -> Field SqlBool) (MaybeFields a)
optionalRestrictOptional Select a
q = SelectArr (a -> Column SqlBool) a
-> SelectArr (a -> Column SqlBool) (MaybeFields a)
forall i a. SelectArr i a -> SelectArr i (MaybeFields a)
optional (SelectArr (a -> Column SqlBool) a
-> SelectArr (a -> Column SqlBool) (MaybeFields a))
-> SelectArr (a -> Column SqlBool) a
-> SelectArr (a -> Column SqlBool) (MaybeFields a)
forall a b. (a -> b) -> a -> b
$ proc a -> Column SqlBool
cond -> do
a
a <- Select a
q -< ()
SelectArr (Column SqlBool) ()
SelectArr (Field SqlBool) ()
restrict -< a -> Column SqlBool
cond a
a
SelectArr a a
forall (a :: * -> * -> *) b. Arrow a => a b b
returnA -< a
a
fromFieldsMaybeFields :: RQ.FromFields fields haskells
-> RQ.FromFields (MaybeFields fields) (Maybe haskells)
fromFieldsMaybeFields :: FromFields fields haskells
-> FromFields (MaybeFields fields) (Maybe haskells)
fromFieldsMaybeFields (RQ.QueryRunner Unpackspec fields ()
u fields -> RowParser haskells
p fields -> Int
c) = Unpackspec (MaybeFields fields) ()
-> (MaybeFields fields -> RowParser (Maybe haskells))
-> (MaybeFields fields -> Int)
-> FromFields (MaybeFields fields) (Maybe haskells)
forall columns haskells.
Unpackspec columns ()
-> (columns -> RowParser haskells)
-> (columns -> Int)
-> FromFields columns haskells
RQ.QueryRunner Unpackspec (MaybeFields fields) ()
u' MaybeFields fields -> RowParser (Maybe haskells)
p' MaybeFields fields -> Int
c'
where u' :: Unpackspec (MaybeFields fields) ()
u' = () ()
-> Unpackspec (MaybeFields fields) (MaybeFields ())
-> Unpackspec (MaybeFields fields) ()
forall (f :: * -> *) a b. Functor f => a -> f b -> f a
<$ Unpackspec (Field SqlBool) (Field SqlBool)
-> Unpackspec fields ()
-> Unpackspec (MaybeFields fields) (MaybeFields ())
forall (p :: * -> * -> *) a b.
ProductProfunctor p =>
p (Field SqlBool) (Field SqlBool)
-> p a b -> p (MaybeFields a) (MaybeFields b)
productProfunctorMaybeFields Unpackspec (Field SqlBool) (Field SqlBool)
forall a. Unpackspec (Column a) (Column a)
U.unpackspecField Unpackspec fields ()
u
p' :: MaybeFields fields -> RowParser (Maybe haskells)
p' = \MaybeFields fields
mf -> do
Bool
hIsPresent <- RowParser Bool
forall a. FromField a => RowParser a
PGSR.field
case Bool
hIsPresent of
Bool
True -> haskells -> Maybe haskells
forall a. a -> Maybe a
Just (haskells -> Maybe haskells)
-> RowParser haskells -> RowParser (Maybe haskells)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> fields -> RowParser haskells
p (MaybeFields fields -> fields
forall fields. MaybeFields fields -> fields
mfFields MaybeFields fields
mf)
Bool
False -> Maybe haskells
forall a. Maybe a
Nothing Maybe haskells -> RowParser () -> RowParser (Maybe haskells)
forall (f :: * -> *) a b. Functor f => a -> f b -> f a
<$ Int -> RowParser () -> RowParser ()
forall (m :: * -> *) a. Applicative m => Int -> m a -> m ()
replicateM_ (fields -> Int
c (MaybeFields fields -> fields
forall fields. MaybeFields fields -> fields
mfFields MaybeFields fields
mf))
(FieldParser () -> RowParser ()
forall a. FieldParser a -> RowParser a
PGSR.fieldWith (\Field
_ Maybe ByteString
_ -> () -> Conversion ()
forall (f :: * -> *) a. Applicative f => a -> f a
pure ()))
c' :: MaybeFields fields -> Int
c' = \MaybeFields fields
mf -> fields -> Int
c (MaybeFields fields -> fields
forall fields. MaybeFields fields -> fields
mfFields MaybeFields fields
mf) Int -> Int -> Int
forall a. Num a => a -> a -> a
+ Int
1
productProfunctorMaybeFields :: PP.ProductProfunctor p
=> p (Field SqlBool) (Field SqlBool)
-> p a b
-> p (MaybeFields a) (MaybeFields b)
productProfunctorMaybeFields :: p (Field SqlBool) (Field SqlBool)
-> p a b -> p (MaybeFields a) (MaybeFields b)
productProfunctorMaybeFields p (Field SqlBool) (Field SqlBool)
b p a b
p = Column SqlBool -> b -> MaybeFields b
forall fields. Column SqlBool -> fields -> MaybeFields fields
MaybeFields (Column SqlBool -> b -> MaybeFields b)
-> p (MaybeFields a) (Column SqlBool)
-> p (MaybeFields a) (b -> MaybeFields b)
forall (p :: * -> * -> *) b c a.
ProductProfunctor p =>
(b -> c) -> p a b -> p a c
PP.***$ (MaybeFields a -> Column SqlBool)
-> p (Column SqlBool) (Column SqlBool)
-> p (MaybeFields a) (Column SqlBool)
forall (p :: * -> * -> *) a b c.
Profunctor p =>
(a -> b) -> p b c -> p a c
P.lmap MaybeFields a -> Column SqlBool
forall fields. MaybeFields fields -> Column SqlBool
mfPresent p (Column SqlBool) (Column SqlBool)
p (Field SqlBool) (Field SqlBool)
b
p (MaybeFields a) (b -> MaybeFields b)
-> p (MaybeFields a) b -> p (MaybeFields a) (MaybeFields b)
forall (p :: * -> * -> *) a b c.
ProductProfunctor p =>
p a (b -> c) -> p a b -> p a c
PP.**** (MaybeFields a -> a) -> p a b -> p (MaybeFields a) b
forall (p :: * -> * -> *) a b c.
Profunctor p =>
(a -> b) -> p b c -> p a c
P.lmap MaybeFields a -> a
forall fields. MaybeFields fields -> fields
mfFields p a b
p
nullspecMaybeFields :: V.Nullspec a b
-> V.Nullspec (MaybeFields a) (MaybeFields b)
nullspecMaybeFields :: Nullspec a b -> Nullspec (MaybeFields a) (MaybeFields b)
nullspecMaybeFields = Nullspec (Field SqlBool) (Field SqlBool)
-> Nullspec a b -> Nullspec (MaybeFields a) (MaybeFields b)
forall (p :: * -> * -> *) a b.
ProductProfunctor p =>
p (Field SqlBool) (Field SqlBool)
-> p a b -> p (MaybeFields a) (MaybeFields b)
productProfunctorMaybeFields Nullspec (Field SqlBool) (Field SqlBool)
forall b a. IsSqlType b => Nullspec a (Column b)
V.nullspecField
unpackspecMaybeFields :: U.Unpackspec a b
-> U.Unpackspec (MaybeFields a) (MaybeFields b)
unpackspecMaybeFields :: Unpackspec a b -> Unpackspec (MaybeFields a) (MaybeFields b)
unpackspecMaybeFields = Unpackspec (Field SqlBool) (Field SqlBool)
-> Unpackspec a b -> Unpackspec (MaybeFields a) (MaybeFields b)
forall (p :: * -> * -> *) a b.
ProductProfunctor p =>
p (Field SqlBool) (Field SqlBool)
-> p a b -> p (MaybeFields a) (MaybeFields b)
productProfunctorMaybeFields Unpackspec (Field SqlBool) (Field SqlBool)
forall a. Unpackspec (Column a) (Column a)
U.unpackspecField
valuesspecMaybeFields :: V.Valuesspec a b
-> V.Valuesspec (MaybeFields a) (MaybeFields b)
valuesspecMaybeFields :: Valuesspec a b -> Valuesspec (MaybeFields a) (MaybeFields b)
valuesspecMaybeFields = Valuesspec (Field SqlBool) (Field SqlBool)
-> Valuesspec a b -> Valuesspec (MaybeFields a) (MaybeFields b)
forall (p :: * -> * -> *) a b.
ProductProfunctor p =>
p (Field SqlBool) (Field SqlBool)
-> p a b -> p (MaybeFields a) (MaybeFields b)
productProfunctorMaybeFields Valuesspec (Field SqlBool) (Field SqlBool)
forall a. IsSqlType a => Valuesspec (Column a) (Column a)
V.valuesspecField
toFieldsMaybeFields :: V.Nullspec a b
-> Constant.ToFields a b
-> Constant.ToFields (Maybe a) (MaybeFields b)
toFieldsMaybeFields :: Nullspec a b -> ToFields a b -> ToFields (Maybe a) (MaybeFields b)
toFieldsMaybeFields Nullspec a b
n ToFields a b
p = (Maybe a -> MaybeFields b) -> ToFields (Maybe a) (MaybeFields b)
forall haskells fields.
(haskells -> fields) -> ToFields haskells fields
Constant.toToFields ((Maybe a -> MaybeFields b) -> ToFields (Maybe a) (MaybeFields b))
-> (Maybe a -> MaybeFields b) -> ToFields (Maybe a) (MaybeFields b)
forall a b. (a -> b) -> a -> b
$ \case
Maybe a
Nothing -> Nullspec a b -> MaybeFields b
forall a b. Nullspec a b -> MaybeFields b
nothingFieldsExplicit Nullspec a b
n
Just a
a -> b -> MaybeFields b
forall a. a -> MaybeFields a
justFields (ToFields a b -> a -> b
forall haskells fields.
ToFields haskells fields -> haskells -> fields
Constant.toFieldsExplicit ToFields a b
p a
a)
ifPPMaybeFields :: IfPP a b -> IfPP (MaybeFields a) (MaybeFields b)
ifPPMaybeFields :: IfPP a b -> IfPP (MaybeFields a) (MaybeFields b)
ifPPMaybeFields = IfPP (Field SqlBool) (Field SqlBool)
-> IfPP a b -> IfPP (MaybeFields a) (MaybeFields b)
forall (p :: * -> * -> *) a b.
ProductProfunctor p =>
p (Field SqlBool) (Field SqlBool)
-> p a b -> p (MaybeFields a) (MaybeFields b)
productProfunctorMaybeFields IfPP (Field SqlBool) (Field SqlBool)
forall (p :: * -> * -> *) a b. Default p a b => p a b
PP.def
eqPPMaybeFields :: EqPP a b -> EqPP (MaybeFields a) (MaybeFields b)
eqPPMaybeFields :: EqPP a b -> EqPP (MaybeFields a) (MaybeFields b)
eqPPMaybeFields (EqPP a -> a -> Column SqlBool
eqFields) = (MaybeFields a -> MaybeFields a -> Column SqlBool)
-> EqPP (MaybeFields a) (MaybeFields b)
forall a b. (a -> a -> Column SqlBool) -> EqPP a b
EqPP (\MaybeFields a
m1 MaybeFields a
m2 ->
(MaybeFields a -> Column SqlBool
forall fields. MaybeFields fields -> Column SqlBool
mfPresent MaybeFields a
m1 Column SqlBool -> Column SqlBool -> Column SqlBool
forall columns.
Default EqPP columns columns =>
columns -> columns -> Column SqlBool
.== MaybeFields a -> Column SqlBool
forall fields. MaybeFields fields -> Column SqlBool
mfPresent MaybeFields a
m2)
Column SqlBool -> Column SqlBool -> Column SqlBool
.&& (MaybeFields a -> Column SqlBool
forall fields. MaybeFields fields -> Column SqlBool
mfPresent MaybeFields a
m1 Column SqlBool -> Column SqlBool -> Column SqlBool
`implies` a -> a -> Column SqlBool
eqFields (MaybeFields a -> a
forall fields. MaybeFields fields -> fields
mfFields MaybeFields a
m1) (MaybeFields a -> a
forall fields. MaybeFields fields -> fields
mfFields MaybeFields a
m2)))
where Column SqlBool
a implies :: Column SqlBool -> Column SqlBool -> Field SqlBool
`implies` Column SqlBool
b = Field SqlBool -> Field SqlBool
Opaleye.Internal.Operators.not Column SqlBool
Field SqlBool
a Field SqlBool -> Field SqlBool -> Field SqlBool
.|| Column SqlBool
Field SqlBool
b
unWithNulls :: PP.ProductProfunctor p
=> p (Field SqlBool) (Field SqlBool)
-> WithNulls p a b
-> p (MaybeFields a) (MaybeFields b)
unWithNulls :: p (Field SqlBool) (Field SqlBool)
-> WithNulls p a b -> p (MaybeFields a) (MaybeFields b)
unWithNulls p (Field SqlBool) (Field SqlBool)
b (WithNulls p (MaybeFields a) b
d) =
Column SqlBool -> b -> MaybeFields b
forall fields. Column SqlBool -> fields -> MaybeFields fields
MaybeFields (Column SqlBool -> b -> MaybeFields b)
-> p (MaybeFields a) (Column SqlBool)
-> p (MaybeFields a) (b -> MaybeFields b)
forall (p :: * -> * -> *) b c a.
ProductProfunctor p =>
(b -> c) -> p a b -> p a c
PP.***$ (MaybeFields a -> Column SqlBool)
-> p (Column SqlBool) (Column SqlBool)
-> p (MaybeFields a) (Column SqlBool)
forall (p :: * -> * -> *) a b c.
Profunctor p =>
(a -> b) -> p b c -> p a c
P.lmap MaybeFields a -> Column SqlBool
forall fields. MaybeFields fields -> Column SqlBool
mfPresent p (Column SqlBool) (Column SqlBool)
p (Field SqlBool) (Field SqlBool)
b
p (MaybeFields a) (b -> MaybeFields b)
-> p (MaybeFields a) b -> p (MaybeFields a) (MaybeFields b)
forall (p :: * -> * -> *) a b c.
ProductProfunctor p =>
p a (b -> c) -> p a b -> p a c
PP.**** p (MaybeFields a) b
d
newtype WithNulls p a b =
WithNulls (p (MaybeFields a) b)
mapMaybeFieldsWithNulls :: PP.ProductProfunctor p
=> p (Field SqlBool) (Field SqlBool)
-> WithNulls p a b
-> WithNulls p (MaybeFields a) (MaybeFields b)
mapMaybeFieldsWithNulls :: p (Field SqlBool) (Field SqlBool)
-> WithNulls p a b -> WithNulls p (MaybeFields a) (MaybeFields b)
mapMaybeFieldsWithNulls p (Field SqlBool) (Field SqlBool)
b WithNulls p a b
d =
Column SqlBool -> b -> MaybeFields b
forall fields. Column SqlBool -> fields -> MaybeFields fields
MaybeFields (Column SqlBool -> b -> MaybeFields b)
-> WithNulls p (MaybeFields a) (Column SqlBool)
-> WithNulls p (MaybeFields a) (b -> MaybeFields b)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> (MaybeFields a -> Column SqlBool)
-> WithNulls p (Column SqlBool) (Column SqlBool)
-> WithNulls p (MaybeFields a) (Column SqlBool)
forall (p :: * -> * -> *) a b c.
Profunctor p =>
(a -> b) -> p b c -> p a c
P.lmap MaybeFields a -> Column SqlBool
forall fields. MaybeFields fields -> Column SqlBool
mfPresent (p (Column SqlBool) (Column SqlBool)
-> WithNulls p (Column SqlBool) (Column SqlBool)
forall a (p :: * -> * -> *).
(IsSqlType a, Profunctor p) =>
p (Column a) (Column a) -> WithNulls p (Column a) (Column a)
withNullsField p (Column SqlBool) (Column SqlBool)
p (Field SqlBool) (Field SqlBool)
b)
WithNulls p (MaybeFields a) (b -> MaybeFields b)
-> WithNulls p (MaybeFields a) b
-> WithNulls p (MaybeFields a) (MaybeFields b)
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
<*> (MaybeFields a -> a)
-> WithNulls p a b -> WithNulls p (MaybeFields a) b
forall (p :: * -> * -> *) a b c.
Profunctor p =>
(a -> b) -> p b c -> p a c
P.lmap MaybeFields a -> a
forall fields. MaybeFields fields -> fields
mfFields WithNulls p a b
d
withNullsField :: (IsSqlType a, P.Profunctor p)
=> p (IC.Column a) (IC.Column a)
-> WithNulls p (IC.Column a) (IC.Column a)
withNullsField :: p (Column a) (Column a) -> WithNulls p (Column a) (Column a)
withNullsField p (Column a) (Column a)
col = WithNulls p (Column a) (Column a)
result
where result :: WithNulls p (Column a) (Column a)
result = p (MaybeFields (Column a)) (Column a)
-> WithNulls p (Column a) (Column a)
forall (p :: * -> * -> *) a b.
p (MaybeFields a) b -> WithNulls p a b
WithNulls ((MaybeFields (Column a) -> Column a)
-> p (Column a) (Column a) -> p (MaybeFields (Column a)) (Column a)
forall (p :: * -> * -> *) a b c.
Profunctor p =>
(a -> b) -> p b c -> p a c
P.lmap (\(MaybeFields Column SqlBool
b Column a
c) ->
IfPP (Column a) (Column a)
-> Column SqlBool -> Column a -> Column a -> Column a
forall columns columns'.
IfPP columns columns'
-> Column SqlBool -> columns -> columns -> columns'
ifExplict IfPP (Column a) (Column a)
forall (p :: * -> * -> *) a b. Default p a b => p a b
PP.def Column SqlBool
b Column a
c Column a
nullC) p (Column a) (Column a)
col)
nullC :: Column a
nullC = PrimExpr -> Column a
forall pgType. PrimExpr -> Column pgType
IC.Column (Maybe a -> PrimExpr
forall a (proxy :: * -> *). IsSqlType a => proxy a -> PrimExpr
V.nullPE (WithNulls p (Column a) (Column a) -> Maybe a
forall (f :: * -> *) sqlType. f (Column sqlType) -> Maybe sqlType
columnProxy WithNulls p (Column a) (Column a)
result))
columnProxy :: f (IC.Column sqlType) -> Maybe sqlType
columnProxy :: f (Column sqlType) -> Maybe sqlType
columnProxy f (Column sqlType)
_ = Maybe sqlType
forall a. Maybe a
Nothing
binaryspecMaybeFields
:: WithNulls B.Binaryspec a b
-> B.Binaryspec (MaybeFields a) (MaybeFields b)
binaryspecMaybeFields :: WithNulls Binaryspec a b
-> Binaryspec (MaybeFields a) (MaybeFields b)
binaryspecMaybeFields = Binaryspec (Field SqlBool) (Field SqlBool)
-> WithNulls Binaryspec a b
-> Binaryspec (MaybeFields a) (MaybeFields b)
forall (p :: * -> * -> *) a b.
ProductProfunctor p =>
p (Field SqlBool) (Field SqlBool)
-> WithNulls p a b -> p (MaybeFields a) (MaybeFields b)
unWithNulls Binaryspec (Field SqlBool) (Field SqlBool)
forall (p :: * -> * -> *) a b. Default p a b => p a b
PP.def
instance P.Profunctor p => P.Profunctor (WithNulls p) where
dimap :: (a -> b) -> (c -> d) -> WithNulls p b c -> WithNulls p a d
dimap a -> b
f c -> d
g (WithNulls p (MaybeFields b) c
d) = p (MaybeFields a) d -> WithNulls p a d
forall (p :: * -> * -> *) a b.
p (MaybeFields a) b -> WithNulls p a b
WithNulls ((MaybeFields a -> MaybeFields b)
-> (c -> d) -> p (MaybeFields b) c -> p (MaybeFields a) d
forall (p :: * -> * -> *) a b c d.
Profunctor p =>
(a -> b) -> (c -> d) -> p b c -> p a d
P.dimap ((a -> b) -> MaybeFields a -> MaybeFields b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap a -> b
f) c -> d
g p (MaybeFields b) c
d)
instance P.Profunctor p => Functor (WithNulls p a) where
fmap :: (a -> b) -> WithNulls p a a -> WithNulls p a b
fmap = (a -> b) -> WithNulls p a a -> WithNulls p a b
forall (p :: * -> * -> *) b c a.
Profunctor p =>
(b -> c) -> p a b -> p a c
P.rmap
instance PP.ProductProfunctor p => Applicative (WithNulls p a) where
pure :: a -> WithNulls p a a
pure = p (MaybeFields a) a -> WithNulls p a a
forall (p :: * -> * -> *) a b.
p (MaybeFields a) b -> WithNulls p a b
WithNulls (p (MaybeFields a) a -> WithNulls p a a)
-> (a -> p (MaybeFields a) a) -> a -> WithNulls p a a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. a -> p (MaybeFields a) a
forall (p :: * -> * -> *) b a. ProductProfunctor p => b -> p a b
PP.purePP
WithNulls p (MaybeFields a) (a -> b)
fd <*> :: WithNulls p a (a -> b) -> WithNulls p a a -> WithNulls p a b
<*> WithNulls p (MaybeFields a) a
xd = p (MaybeFields a) b -> WithNulls p a b
forall (p :: * -> * -> *) a b.
p (MaybeFields a) b -> WithNulls p a b
WithNulls (p (MaybeFields a) (a -> b)
fd p (MaybeFields a) (a -> b)
-> p (MaybeFields a) a -> p (MaybeFields a) b
forall (p :: * -> * -> *) a b c.
ProductProfunctor p =>
p a (b -> c) -> p a b -> p a c
PP.**** p (MaybeFields a) a
xd)
instance PP.ProductProfunctor p => PP.ProductProfunctor (WithNulls p) where
purePP :: b -> WithNulls p a b
purePP = b -> WithNulls p a b
forall (f :: * -> *) a. Applicative f => a -> f a
pure
**** :: WithNulls p a (b -> c) -> WithNulls p a b -> WithNulls p a c
(****) = WithNulls p a (b -> c) -> WithNulls p a b -> WithNulls p a c
forall (f :: * -> *) a b. Applicative f => f (a -> b) -> f a -> f b
(<*>)
instance PP.SumProfunctor p => PP.SumProfunctor (WithNulls p) where
WithNulls p (MaybeFields a) b
ff +++! :: WithNulls p a b
-> WithNulls p a' b' -> WithNulls p (Either a a') (Either b b')
+++! WithNulls p (MaybeFields a') b'
xf =
p (MaybeFields (Either a a')) (Either b b')
-> WithNulls p (Either a a') (Either b b')
forall (p :: * -> * -> *) a b.
p (MaybeFields a) b -> WithNulls p a b
WithNulls (((MaybeFields (Either a a')
-> Either (MaybeFields a) (MaybeFields a'))
-> p (Either (MaybeFields a) (MaybeFields a')) (Either b b')
-> p (MaybeFields (Either a a')) (Either b b'))
-> p (Either (MaybeFields a) (MaybeFields a')) (Either b b')
-> (MaybeFields (Either a a')
-> Either (MaybeFields a) (MaybeFields a'))
-> p (MaybeFields (Either a a')) (Either b b')
forall a b c. (a -> b -> c) -> b -> a -> c
flip (MaybeFields (Either a a')
-> Either (MaybeFields a) (MaybeFields a'))
-> p (Either (MaybeFields a) (MaybeFields a')) (Either b b')
-> p (MaybeFields (Either a a')) (Either b b')
forall (p :: * -> * -> *) a b c.
Profunctor p =>
(a -> b) -> p b c -> p a c
P.lmap (p (MaybeFields a) b
ff p (MaybeFields a) b
-> p (MaybeFields a') b'
-> p (Either (MaybeFields a) (MaybeFields a')) (Either b b')
forall (p :: * -> * -> *) a b a' b'.
SumProfunctor p =>
p a b -> p a' b' -> p (Either a a') (Either b b')
PP.+++! p (MaybeFields a') b'
xf) ((MaybeFields (Either a a')
-> Either (MaybeFields a) (MaybeFields a'))
-> p (MaybeFields (Either a a')) (Either b b'))
-> (MaybeFields (Either a a')
-> Either (MaybeFields a) (MaybeFields a'))
-> p (MaybeFields (Either a a')) (Either b b')
forall a b. (a -> b) -> a -> b
$ \case
MaybeFields Column SqlBool
b (Left a
l) -> MaybeFields a -> Either (MaybeFields a) (MaybeFields a')
forall a b. a -> Either a b
Left (Column SqlBool -> a -> MaybeFields a
forall fields. Column SqlBool -> fields -> MaybeFields fields
MaybeFields Column SqlBool
b a
l)
MaybeFields Column SqlBool
b (Right a'
r) -> MaybeFields a' -> Either (MaybeFields a) (MaybeFields a')
forall a b. b -> Either a b
Right (Column SqlBool -> a' -> MaybeFields a'
forall fields. Column SqlBool -> fields -> MaybeFields fields
MaybeFields Column SqlBool
b a'
r))
instance PP.Default RQ.FromFields fields haskells
=> PP.Default RQ.FromFields (MaybeFields fields) (Maybe haskells) where
def :: FromFields (MaybeFields fields) (Maybe haskells)
def = FromFields fields haskells
-> FromFields (MaybeFields fields) (Maybe haskells)
forall fields haskells.
FromFields fields haskells
-> FromFields (MaybeFields fields) (Maybe haskells)
fromFieldsMaybeFields FromFields fields haskells
forall (p :: * -> * -> *) a b. Default p a b => p a b
PP.def
instance PP.Default U.Unpackspec a b
=> PP.Default U.Unpackspec (MaybeFields a) (MaybeFields b) where
def :: Unpackspec (MaybeFields a) (MaybeFields b)
def = Unpackspec a b -> Unpackspec (MaybeFields a) (MaybeFields b)
forall a b.
Unpackspec a b -> Unpackspec (MaybeFields a) (MaybeFields b)
unpackspecMaybeFields Unpackspec a b
forall (p :: * -> * -> *) a b. Default p a b => p a b
PP.def
instance PP.Default V.Valuesspec a b
=> PP.Default V.Valuesspec (MaybeFields a) (MaybeFields b) where
def :: Valuesspec (MaybeFields a) (MaybeFields b)
def = Valuesspec a b -> Valuesspec (MaybeFields a) (MaybeFields b)
forall a b.
Valuesspec a b -> Valuesspec (MaybeFields a) (MaybeFields b)
valuesspecMaybeFields Valuesspec a b
forall (p :: * -> * -> *) a b. Default p a b => p a b
PP.def
instance (PP.Default Constant.ToFields a b, PP.Default V.Nullspec a b)
=> PP.Default Constant.ToFields (Maybe a) (MaybeFields b) where
def :: ToFields (Maybe a) (MaybeFields b)
def = Nullspec a b -> ToFields a b -> ToFields (Maybe a) (MaybeFields b)
forall a b.
Nullspec a b -> ToFields a b -> ToFields (Maybe a) (MaybeFields b)
toFieldsMaybeFields Nullspec a b
forall (p :: * -> * -> *) a b. Default p a b => p a b
PP.def ToFields a b
forall (p :: * -> * -> *) a b. Default p a b => p a b
PP.def
instance PP.Default IfPP a b
=> PP.Default IfPP (MaybeFields a) (MaybeFields b) where
def :: IfPP (MaybeFields a) (MaybeFields b)
def = IfPP a b -> IfPP (MaybeFields a) (MaybeFields b)
forall a b. IfPP a b -> IfPP (MaybeFields a) (MaybeFields b)
ifPPMaybeFields IfPP a b
forall (p :: * -> * -> *) a b. Default p a b => p a b
PP.def
instance PP.Default EqPP a b
=> PP.Default EqPP (MaybeFields a) (MaybeFields b) where
def :: EqPP (MaybeFields a) (MaybeFields b)
def = EqPP a b -> EqPP (MaybeFields a) (MaybeFields b)
forall a b. EqPP a b -> EqPP (MaybeFields a) (MaybeFields b)
eqPPMaybeFields EqPP a b
forall (p :: * -> * -> *) a b. Default p a b => p a b
PP.def
instance (P.Profunctor p, IsSqlType a, PP.Default p (IC.Column a) (IC.Column a))
=> PP.Default (WithNulls p) (IC.Column a) (IC.Column a) where
def :: WithNulls p (Column a) (Column a)
def = p (Column a) (Column a) -> WithNulls p (Column a) (Column a)
forall a (p :: * -> * -> *).
(IsSqlType a, Profunctor p) =>
p (Column a) (Column a) -> WithNulls p (Column a) (Column a)
withNullsField p (Column a) (Column a)
forall (p :: * -> * -> *) a b. Default p a b => p a b
PP.def
instance PP.Default (WithNulls B.Binaryspec) a b
=> PP.Default B.Binaryspec (MaybeFields a) (MaybeFields b) where
def :: Binaryspec (MaybeFields a) (MaybeFields b)
def = WithNulls Binaryspec a b
-> Binaryspec (MaybeFields a) (MaybeFields b)
forall a b.
WithNulls Binaryspec a b
-> Binaryspec (MaybeFields a) (MaybeFields b)
binaryspecMaybeFields WithNulls Binaryspec a b
forall (p :: * -> * -> *) a b. Default p a b => p a b
PP.def
instance (PP.Default (Inferrable RQ.FromFields) fields haskells,
Maybe haskells ~ maybe_haskells)
=> PP.Default (Inferrable RQ.FromFields) (MaybeFields fields) maybe_haskells where
def :: Inferrable FromFields (MaybeFields fields) maybe_haskells
def = FromFields (MaybeFields fields) (Maybe haskells)
-> Inferrable FromFields (MaybeFields fields) (Maybe haskells)
forall (p :: * -> * -> *) a b. p a b -> Inferrable p a b
Inferrable (FromFields fields haskells
-> FromFields (MaybeFields fields) (Maybe haskells)
forall fields haskells.
FromFields fields haskells
-> FromFields (MaybeFields fields) (Maybe haskells)
fromFieldsMaybeFields (Inferrable FromFields fields haskells -> FromFields fields haskells
forall (p :: * -> * -> *) a b. Inferrable p a b -> p a b
runInferrable Inferrable FromFields fields haskells
forall (p :: * -> * -> *) a b. Default p a b => p a b
PP.def))
instance (PP.Default (Inferrable Constant.ToFields) a b, PP.Default V.Nullspec a b,
MaybeFields b ~ maybeFields_b)
=> PP.Default (Inferrable Constant.ToFields) (Maybe a) maybeFields_b where
def :: Inferrable ToFields (Maybe a) maybeFields_b
def = ToFields (Maybe a) (MaybeFields b)
-> Inferrable ToFields (Maybe a) (MaybeFields b)
forall (p :: * -> * -> *) a b. p a b -> Inferrable p a b
Inferrable (Nullspec a b -> ToFields a b -> ToFields (Maybe a) (MaybeFields b)
forall a b.
Nullspec a b -> ToFields a b -> ToFields (Maybe a) (MaybeFields b)
toFieldsMaybeFields Nullspec a b
forall (p :: * -> * -> *) a b. Default p a b => p a b
PP.def (Inferrable ToFields a b -> ToFields a b
forall (p :: * -> * -> *) a b. Inferrable p a b -> p a b
runInferrable Inferrable ToFields a b
forall (p :: * -> * -> *) a b. Default p a b => p a b
PP.def))