| Safe Haskell | None |
|---|---|
| Language | Haskell2010 |
Generics.SOP.GGP
Description
Derive generics-sop boilerplate instances from GHC's Generic.
The technique being used here is described in the following paper:
- José Pedro Magalhães and Andres Löh. Generic Generic Programming. Practical Aspects of Declarative Languages (PADL) 2014.
Synopsis
- type GCode (a :: Type) = ToSumCode (Rep a) '[]
- type GFrom a = GSumFrom (Rep a)
- type GTo a = GSumTo (Rep a)
- type GDatatypeInfo a = DemoteDatatypeInfo (GDatatypeInfoOf a) (GCode a)
- type GDatatypeInfoOf (a :: Type) = ToInfo (Rep a)
- gfrom :: (GFrom a, Generic a) => a -> SOP I (GCode a)
- gto :: forall a. (GTo a, Generic a) => SOP I (GCode a) -> a
- gdatatypeInfo :: forall proxy a. GDatatypeInfo a => proxy a -> DatatypeInfo (GCode a)
Documentation
type GCode (a :: Type) = ToSumCode (Rep a) '[] Source #
Compute the SOP code of a datatype.
This requires that Rep is defined, which in turn requires that
the type has a Generic (from module GHC.Generics) instance.
This is the default definition for Code.
For more info, see Generic.
type GDatatypeInfo a = DemoteDatatypeInfo (GDatatypeInfoOf a) (GCode a) Source #
Constraint for the class that computes gdatatypeInfo.
type GDatatypeInfoOf (a :: Type) = ToInfo (Rep a) Source #
Compute the datatype info of a datatype.
Since: generics-sop-0.3.0.0
gfrom :: (GFrom a, Generic a) => a -> SOP I (GCode a) Source #
An automatically computed version of from.
This requires that the type being converted has a
Generic (from module GHC.Generics) instance.
This is the default definition for from.
For more info, see Generic.
gto :: forall a. (GTo a, Generic a) => SOP I (GCode a) -> a Source #
An automatically computed version of to.
This requires that the type being converted has a
Generic (from module GHC.Generics) instance.
This is the default definition for to.
For more info, see Generic.
gdatatypeInfo :: forall proxy a. GDatatypeInfo a => proxy a -> DatatypeInfo (GCode a) Source #
An automatically computed version of datatypeInfo.
This requires that the type being converted has a
Generic (from module GHC.Generics) instance.
This is the default definition for datatypeInfo.
For more info, see HasDatatypeInfo.