The current implementation integrates with the new GHC Generics. See
http://www.haskell.org/haskellwiki/GHC.Generics for more information.
Template Haskell code is provided for supporting older GHCs.
Backported MonadPlus and MonadZip instances for U1, and made the
Functor, Foldable, Traversable, Alternative, and Monad instances
for U1 lazier to correspond with base-4.9
1.10.3
Backported Enum, Bounded, Ix, Functor, Applicative, Monad,
MonadFix, MonadPlus, MonadZip, Foldable, Traversable, and
Data instances (introduced in base-4.9) for datatypes in the
Generics.Deriving.Base module
1.10.2
Fix TH regression on GHC 7.0
1.10.1
Added Generics.Deriving.Semigroup
Added GMonoid instance for Data.Monoid.Alt
Fixed a bug in the GEnum instances for unsigned Integral types
Added Safe/Trustworthy pragmas
Made instances polykinded where possible
1.10.0
On GHC 8.0 and up, Generics.Deriving.TH uses the new type literal-based
machinery
Rewrote the Template Haskell code to be robust. Among other things, this fixes
a bug with deriving Generic1 instances on GHC 7.8, and makes it easier to
derive Generic1 instances for datatypes that utilize GHC 8.0’s -XTypeInType
extension.
Added deriveAll0 and makeRep0 for symmetry with deriveAll1 and
makeRep1
AddedmakeRep0FromType and makeRep1FromType to make it easier to pass
in the type instance (instead of having to pass each individual type
variable, which can be error-prone)
Added functions with the suffix -WithKindSigs to allow generating type
synonyms with explicit kind signatures in the presence of kind-polymorphic
type variables. This is necessary for some datatypes that use
-XTypeInType to have derived Generic(1) instances, but is not turned on
by default since the TH kind inference is not perfect and would cause
otherwise valid code to be rejected. Use only if you know what you are doing.
Fixed bug where a datatype with a single, nullary constructor would generate
incorrect Generic instances
More sensible GEnum instances for fixed-size integral types
Added GCopoint, GEnum, GEq, GFoldable, GFunctor, GMonoid,
GShow, and GTraversable instances for datatypes introduced in GHC 8.0
Backported Generic(1) instances added in GHC 8.0. Specifically, Generic
instances for Complex (base-4.4 and later) ExitCode, and Version; and
Generic1 instances for Complex (base-4.4 and later) and Proxy
(base-4.7 and later). Added GEnum, GEq, GFoldable, GFunctor, GIx,
GShow, and GTraversable instances for these datatypes where appropriate.
1.9.0
Allow deriving of Generic1 using Template Haskell
Allow deriving of Generic(1) for data families
Allow deriving of Generic(1) for constructor-less plain datatypes (but not
data families, due to technical restrictions)
Support for unboxed representation types on GHC 7.11+
More GCopoint, GEnum, GEq, GFoldable, GFunctor, GIx, GMonoid,
GShow, and GTraversable instances
The field accessors for the (:+:) type in Generics.Deriving.Base have
been removed to be consistent with GHC.Generics
Ensure that TH generates definitions for isNewtype and packageName, if a
recent-enough version of GHC is used
Ensure that TH-generated names are unique for a given data type’s module and
package (similar in spirit to Trac #10487)
