Moduleesqueleto-3.6.0.3Haskell2010

Database.Esqueleto.Experimental.ToMaybe

1 class

Packageesqueleto-3.6.0.3
Exports3
LanguageHaskell2010
LicenceBSD-3-Clause

classclass ToMaybe a where

Associated types

type family ToMaybeT a

Methods

toMaybe :: a -> ToMaybeT a

Instances11ToMaybe, …

ToMaybe (SqlExpr (Value a))Defined in esqueleto-3.6.0.3 · Database.Esqueleto.Experimental.ToMaybe
ToMaybe (SqlExpr (Maybe a))Defined in esqueleto-3.6.0.3 · Database.Esqueleto.Experimental.ToMaybe
ToMaybe (SqlExpr (Entity a))Defined in esqueleto-3.6.0.3 · Database.Esqueleto.Experimental.ToMaybe
(ToMaybe a, ToMaybe b) => ToMaybe (a, b)Defined in esqueleto-3.6.0.3 · Database.Esqueleto.Experimental.ToMaybe
(ToMaybe a, ToMaybe b) => ToMaybe (a :& b)Defined in esqueleto-3.6.0.3 · Database.Esqueleto.Experimental.From.Join · orphan
(ToMaybe a, ToMaybe b, ToMaybe c) => ToMaybe (a, b, c)Defined in esqueleto-3.6.0.3 · Database.Esqueleto.Experimental.ToMaybe
(ToMaybe a, ToMaybe b, ToMaybe c, ToMaybe d) => ToMaybe (a, b, c, d)Defined in esqueleto-3.6.0.3 · Database.Esqueleto.Experimental.ToMaybe
(ToMaybe a, ToMaybe b, ToMaybe c, ToMaybe d, ToMaybe e) => ToMaybe (a, b, c, d, e)Defined in esqueleto-3.6.0.3 · Database.Esqueleto.Experimental.ToMaybe
(ToMaybe a, ToMaybe b, ToMaybe c, ToMaybe d, ToMaybe e, ToMaybe f) => ToMaybe (a, b, c, d, e, f)Defined in esqueleto-3.6.0.3 · Database.Esqueleto.Experimental.ToMaybe
(ToMaybe a, ToMaybe b, ToMaybe c, ToMaybe d, ToMaybe e, ToMaybe f, ToMaybe g) => ToMaybe (a, b, c, d, e, f, g)Defined in esqueleto-3.6.0.3 · Database.Esqueleto.Experimental.ToMaybe
(ToMaybe a, ToMaybe b, ToMaybe c, ToMaybe d, ToMaybe e, ToMaybe f, ToMaybe g, ToMaybe h) => ToMaybe (a, b, c, d, e, f, g, h)Defined in esqueleto-3.6.0.3 · Database.Esqueleto.Experimental.ToMaybe

familytype family ToMaybeT a

Instances11ToMaybeT, …

type ToMaybeT (SqlExpr (Value a)) = SqlExpr (Value (Maybe (Nullable a)))Defined in esqueleto-3.6.0.3 · Database.Esqueleto.Experimental.ToMaybe
type ToMaybeT (SqlExpr (Maybe a)) = SqlExpr (Maybe a)Defined in esqueleto-3.6.0.3 · Database.Esqueleto.Experimental.ToMaybe
type ToMaybeT (SqlExpr (Entity a)) = SqlExpr (Maybe (Entity a))Defined in esqueleto-3.6.0.3 · Database.Esqueleto.Experimental.ToMaybe
type ToMaybeT (a, b) = (ToMaybeT a, ToMaybeT b)Defined in esqueleto-3.6.0.3 · Database.Esqueleto.Experimental.ToMaybe
type ToMaybeT (a, b, c) = (ToMaybeT a, ToMaybeT b, ToMaybeT c)Defined in esqueleto-3.6.0.3 · Database.Esqueleto.Experimental.ToMaybe
type ToMaybeT (a, b, c, d) = (ToMaybeT a, ToMaybeT b, ToMaybeT c, ToMaybeT d)Defined in esqueleto-3.6.0.3 · Database.Esqueleto.Experimental.ToMaybe
type ToMaybeT (a, b, c, d, e) = (ToMaybeT a, ToMaybeT b, ToMaybeT c, ToMaybeT d, ToMaybeT e)Defined in esqueleto-3.6.0.3 · Database.Esqueleto.Experimental.ToMaybe
type ToMaybeT (a, b, c, d, e, f) = (ToMaybeT a, ToMaybeT b, ToMaybeT c, ToMaybeT d, ToMaybeT e, ToMaybeT f)Defined in esqueleto-3.6.0.3 · Database.Esqueleto.Experimental.ToMaybe
type ToMaybeT (a, b, c, d, e, f, g) = (ToMaybeT a, ToMaybeT b, ToMaybeT c, ToMaybeT d, ToMaybeT e, ToMaybeT f, ToMaybeT g)Defined in esqueleto-3.6.0.3 · Database.Esqueleto.Experimental.ToMaybe
type ToMaybeT (a, b, c, d, e, f, g, h) = (ToMaybeT a, ToMaybeT b, ToMaybeT c, ToMaybeT d, ToMaybeT e, ToMaybeT f, ToMaybeT g, ToMaybeT h)Defined in esqueleto-3.6.0.3 · Database.Esqueleto.Experimental.ToMaybe
type ToMaybeT (a :& b) = ToMaybeT a :& ToMaybeT bDefined in esqueleto-3.6.0.3 · Database.Esqueleto.Experimental.From.Join · orphan

familytype family Nullable a where

Equations

Nullable (Maybe a) = a
Nullable a = a