Safe Haskell | None |
---|---|
Language | Haskell2010 |
Documentation
newtype NullMaker a b Source #
NullMaker (a -> b) |
Instances
Profunctor NullMaker Source # | |
Defined in Opaleye.SQLite.Internal.Join dimap :: (a -> b) -> (c -> d) -> NullMaker b c -> NullMaker a d # lmap :: (a -> b) -> NullMaker b c -> NullMaker a c # rmap :: (b -> c) -> NullMaker a b -> NullMaker a c # (#.) :: forall a b c q. Coercible c b => q b c -> NullMaker a b -> NullMaker a c # (.#) :: forall a b c q. Coercible b a => NullMaker b c -> q a b -> NullMaker a c # | |
ProductProfunctor NullMaker Source # | |
Default NullMaker (Column a) (Column (Nullable a)) Source # | |
Default NullMaker (Column (Nullable a)) (Column (Nullable a)) Source # | |
toNullable :: NullMaker a b -> a -> b Source #