Changes in 0.11.0 [2019.09.06]

• Reexport MonadFail(fail) from Prelude.Compat and Control.Monad.Compat.

  Because Prelude.Compat.fail now corresponds to the fail from MonadFail instead of Monad, some care is required to implement Monad.fail on pre-8.8 versions of GHC. The following template is recommended:

  import Prelude.Compat
  import qualified Control.Monad      as Monad
  import qualified Control.Monad.Fail as Fail
  
  data Blah a = ...
  
  instance Functor Blah where ...
  instance Applicative Blah where ...
  
  instance Monad.Monad Blah where
    (>>=) = ...
  #if !(MIN_VERSION_base(4,13,0))
    fail = Fail.fail
  #endif
  
  instance Fail.MonadFail Blah where
    fail = ...
  

  This approach is also backwards-compatible with previous releases of base-compat-batteries.

• Introduce the Data.Type.Equality.Compat module, which reexports Data.Type.Equality from base (if using a sufficiently recent version of GHC) or the type-equality library (if using an old GHC).

• This coincides with the base-compat-0.11.0 release. Refer to the base-compat changelog for more details.

Changes in 0.10.5 [2018.10.18]

• This coincides with the base-compat-0.10.5 release. Refer to the base-compat changelog for more details.

Changes in 0.10.4 [2018.07.03]

• Add a SafeHaskellSpec test which ensures that certain modules (such as Prelude.Compat) can be imported in the presence of Safe.
• This coincides with the base-compat-0.10.4 release. Refer to the base-compat changelog for more details.

Changes in 0.10.3 [2018.07.02]

• This coincides with the base-compat-0.10.3 release. Refer to the base-compat changelog for more details.

Changes in 0.10.2 [2018.07.02]

• Sync with base-4.12/GHC 8.6
• Introduce the Data.Functor.Contravariant.Compat module, which reexports Data.Functor.Contravariant from base (if using GHC 8.6 or later) or the contravariant library (if using an earlier version of GHC).
• This coincides with the base-compat-0.10.2 release. Refer to the base-compat changelog for more details.

Changes in 0.10.1 [2018.04.10]

• Add Data.List.NonEmpty.Compat.
• Reexport (Data.Semigroup.<>) from Data.Monoid.Compat.
• Tighten lower bounds of compat package dependencies.
• This coincides with the base-compat-0.10.1 release. Refer to the base-compat changelog for more details.

Changes in 0.10.0 [2018.04.05]

• Sync with base-4.11/GHC 8.4
• This coincides with the base-compat-0.10 release. Refer to the base-compat changelog for more details.