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author | Ryan Scott <ryan.gl.scott@gmail.com> | 2016-11-17 09:55:55 -0500 |
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committer | Ryan Scott <ryan.gl.scott@gmail.com> | 2016-11-17 09:55:55 -0500 |
commit | 07e40e905357db805e6dbb557b35d6bdf76eaec6 (patch) | |
tree | ebf804f3c6ae28eef41c06a69e3c82b54c4a794f | |
parent | cede770cc7dddd132ebbc101e60402d8bb37007e (diff) | |
download | haskell-07e40e905357db805e6dbb557b35d6bdf76eaec6.tar.gz |
Add Data instance for Const
-rw-r--r-- | libraries/base/Data/Data.hs | 4 | ||||
-rw-r--r-- | libraries/base/changelog.md | 2 |
2 files changed, 6 insertions, 0 deletions
diff --git a/libraries/base/Data/Data.hs b/libraries/base/Data/Data.hs index df37ab1a1a..e43ec74e3f 100644 --- a/libraries/base/Data/Data.hs +++ b/libraries/base/Data/Data.hs @@ -9,6 +9,7 @@ {-# LANGUAGE ScopedTypeVariables #-} {-# LANGUAGE StandaloneDeriving #-} {-# LANGUAGE Trustworthy #-} +{-# LANGUAGE TypeInType #-} {-# LANGUAGE TypeOperators #-} ----------------------------------------------------------------------------- @@ -1197,6 +1198,9 @@ deriving instance (Coercible a b, Data a, Data b) => Data (Coercion a b) -- | @since 4.9.0.0 deriving instance Data a => Data (Identity a) +-- | @since 4.10.0.0 +deriving instance (Typeable k, Data a, Typeable (b :: k)) => Data (Const a b) + -- | @since 4.7.0.0 deriving instance Data Version diff --git a/libraries/base/changelog.md b/libraries/base/changelog.md index a01c878a53..dcc171979f 100644 --- a/libraries/base/changelog.md +++ b/libraries/base/changelog.md @@ -26,6 +26,8 @@ * Add `Semigroup` instance for `IO`, as well as for `Event` and `Lifetime` from `GHC.Event` (#12464) + * Add `Data` instance for `Const` (#12438) + ## 4.9.0.0 *May 2016* * Bundled with GHC 8.0 |