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| author | Alexandre Baldé <alexandrer_b@outlook.com> | 2019-04-05 00:48:06 +0100 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2019-06-09 11:48:34 -0400 |
| commit | 0462b0e02d8759983484eb09d0ba1be134ec592e (patch) | |
| tree | c5ab0da06b8b4141a94c56b7c9fffefd7d90ed98 /libraries/base/GHC/Base.hs | |
| parent | 8754002973dcde8709458044e541ddc8f4fcf6bb (diff) | |
| download | haskell-0462b0e02d8759983484eb09d0ba1be134ec592e.tar.gz | |
Explain that 'mappend' and '(<>)' should be the same [skip ci]
Diffstat (limited to 'libraries/base/GHC/Base.hs')
| -rw-r--r-- | libraries/base/GHC/Base.hs | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libraries/base/GHC/Base.hs b/libraries/base/GHC/Base.hs index b342386edc..6fd2ff735b 100644 --- a/libraries/base/GHC/Base.hs +++ b/libraries/base/GHC/Base.hs @@ -271,6 +271,9 @@ class Semigroup a => Monoid a where -- -- __NOTE__: This method is redundant and has the default -- implementation @'mappend' = ('<>')@ since /base-4.11.0.0/. + -- Should it be implemented manually, since 'mappend' is a synonym for + -- ('<>'), it is expected that the two functions are defined the same + -- way. In a future GHC release 'mappend' will be removed from 'Monoid'. mappend :: a -> a -> a mappend = (<>) {-# INLINE mappend #-} |