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| author | Simon Jakobi <simon.jakobi@gmail.com> | 2019-04-29 04:49:33 +0200 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2020-09-19 06:57:36 -0400 |
| commit | 45fa82182bc61e3966fd51496c35130cd067a5df (patch) | |
| tree | cdaf62818f24757ad2ebb1d8b66e49701888a48b | |
| parent | 40dc91069d15bfc1d81f1722b39e06cac8fdddd1 (diff) | |
| download | haskell-45fa82182bc61e3966fd51496c35130cd067a5df.tar.gz | |
Deprecate Data.Semigroup.Option
Libraries email: https://mail.haskell.org/pipermail/libraries/2018-April/028724.html
GHC issue: https://gitlab.haskell.org/ghc/ghc/issues/15028
Corresponding PRs for deepseq:
* https://github.com/haskell/deepseq/pull/55
* https://github.com/haskell/deepseq/pull/57
Bumps the deepseq submodule.
| -rw-r--r-- | libraries/base/Data/Semigroup.hs | 9 | ||||
| -rw-r--r-- | libraries/base/changelog.md | 3 | ||||
| m--------- | libraries/deepseq | 0 |
3 files changed, 6 insertions, 6 deletions
diff --git a/libraries/base/Data/Semigroup.hs b/libraries/base/Data/Semigroup.hs index 490f472fe1..54a0a61ed6 100644 --- a/libraries/base/Data/Semigroup.hs +++ b/libraries/base/Data/Semigroup.hs @@ -347,8 +347,6 @@ instance Bifoldable Arg where instance Bitraversable Arg where bitraverse f g (Arg a b) = Arg <$> f a <*> g b --- | Use @'Option' ('First' a)@ to get the behavior of --- 'Data.Monoid.First' from "Data.Monoid". newtype First a = First { getFirst :: a } deriving ( Bounded -- ^ @since 4.9.0.0 , Eq -- ^ @since 4.9.0.0 @@ -405,8 +403,6 @@ instance Monad First where instance MonadFix First where mfix f = fix (f . getFirst) --- | Use @'Option' ('Last' a)@ to get the behavior of --- 'Data.Monoid.Last' from "Data.Monoid" newtype Last a = Last { getLast :: a } deriving ( Bounded -- ^ @since 4.9.0.0 , Eq -- ^ @since 4.9.0.0 @@ -511,6 +507,8 @@ mtimesDefault n x | n == 0 = mempty | otherwise = unwrapMonoid (stimes n (WrapMonoid x)) +{-# DEPRECATED Option, option "will be removed in GHC 9.2; use 'Maybe' instead." #-} + -- | 'Option' is effectively 'Maybe' with a better instance of -- 'Monoid', built off of an underlying 'Semigroup' instead of an -- underlying 'Monoid'. @@ -520,8 +518,7 @@ mtimesDefault n x -- -- In GHC 8.4 and higher, the 'Monoid' instance for 'Maybe' has been -- corrected to lift a 'Semigroup' instance instead of a 'Monoid' --- instance. Consequently, this type is no longer useful. It will be --- marked deprecated in GHC 8.8 and removed in GHC 8.10. +-- instance. Consequently, this type is no longer useful. newtype Option a = Option { getOption :: Maybe a } deriving ( Eq -- ^ @since 4.9.0.0 , Ord -- ^ @since 4.9.0.0 diff --git a/libraries/base/changelog.md b/libraries/base/changelog.md index 5e91f6c79d..eb1bbdff4a 100644 --- a/libraries/base/changelog.md +++ b/libraries/base/changelog.md @@ -14,6 +14,9 @@ * The planned deprecation of `Data.Monoid.First` and `Data.Monoid.Last` is scrapped due to difficulties with the suggested migration path. + * `Data.Semigroup.Option` and the accompanying `option` function are + deprecated and scheduled for removal in 4.16. + * Add `Generic` instances to `Fingerprint`, `GiveGCStats`, `GCFlags`, `ConcFlags`, `DebugFlags`, `CCFlags`, `DoHeapProfile`, `ProfFlags`, `DoTrace`, `TraceFlags`, `TickyFlags`, `ParFlags`, `RTSFlags`, `RTSStats`, diff --git a/libraries/deepseq b/libraries/deepseq -Subproject 13c1c84415da727ab56e9fa33aca5046b668384 +Subproject b8c4fb4debaed6ef7eb6940ca4cfea6bd63cc21 |