Generic instances missing for Int32, Word64 etc.
Some base types have Generic instances, like Integer, the machine-specific ones like Int32 have none. But these would be most useful when using generic Binary serialization.
I think it makes sense to add Generic instances for *all* primitive types in base.
I can define the instance myself, see https://github.com/agda/agda/commit/1d3710189989aced61be79c8e52945651fc94c0e
import GHC.Generics (Generic(..))
import qualified GHC.Generics as Gen
data D_Int32
data C_Int32
instance Gen.Datatype D_Int32 where
datatypeName _ = "Int32"
moduleName _ = "GHC.Int32"
-- packageName _ = "base"
instance Gen.Constructor C_Int32 where
conName _ = "" -- JPM: I'm not sure this is the right implementation...
instance Generic Int32 where
type Rep Int32 = Gen.D1 D_Int32 (Gen.C1 C_Int32 (Gen.S1 Gen.NoSelector (Gen.Rec0 Int32)))
from x = Gen.M1 (Gen.M1 (Gen.M1 (Gen.K1 x)))
to (Gen.M1 (Gen.M1 (Gen.M1 (Gen.K1 x)))) = x
However, as GHC.Generics is a moving target, and changes over the compiler versions, I'd rather not have to.
Trac metadata
Trac field | Value |
---|---|
Version | 7.10.1 |
Type | FeatureRequest |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Core Libraries |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | core-libraries-committee@haskell.org |
Operating system | |
Architecture |