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| author | Baldur Blöndal <baldurpet@gmail.com> | 2022-09-22 01:27:53 +0000 |
|---|---|---|
| committer | Topsii <tobiashaslop@hotmail.de> | 2022-11-30 21:16:36 +0100 |
| commit | d87f28d810b9c536ca4db7f363163e6d0dd6c93c (patch) | |
| tree | 558597fb2921abf4c201019f9ade7b0037443751 /testsuite/tests/deriving | |
| parent | b4cfa8e235715d8c73b2ba0ba05ed8ef92629218 (diff) | |
| download | haskell-d87f28d810b9c536ca4db7f363163e6d0dd6c93c.tar.gz | |
Make Functor a quantified superclass of Bifunctor.
See https://github.com/haskell/core-libraries-committee/issues/91 for
discussion.
This change relates Bifunctor with Functor by requiring second = fmap.
Moreover this change is a step towards unblocking the major version bump
of bifunctors and profunctors to major version 6. This paves the way to
move the Profunctor class into base. For that Functor first similarly
becomes a superclass of Profunctor in the new major version 6.
Diffstat (limited to 'testsuite/tests/deriving')
3 files changed, 3 insertions, 3 deletions
diff --git a/testsuite/tests/deriving/should_compile/T9968a.hs b/testsuite/tests/deriving/should_compile/T9968a.hs index ca5b1b082e..7681581d33 100644 --- a/testsuite/tests/deriving/should_compile/T9968a.hs +++ b/testsuite/tests/deriving/should_compile/T9968a.hs @@ -5,4 +5,4 @@ module T9968 where import Data.Bifunctor data Blah a b = A a | B b - deriving (Bifunctor) + deriving (Functor, Bifunctor) diff --git a/testsuite/tests/deriving/should_compile/T9968a.stderr b/testsuite/tests/deriving/should_compile/T9968a.stderr index 6c77d65670..942879d1c0 100644 --- a/testsuite/tests/deriving/should_compile/T9968a.stderr +++ b/testsuite/tests/deriving/should_compile/T9968a.stderr @@ -1,5 +1,5 @@ -T9968a.hs:8:13: warning: [GHC-06201] [-Wmissing-methods (in -Wdefault)] +T9968a.hs:8:22: warning: [GHC-06201] [-Wmissing-methods (in -Wdefault)] • No explicit implementation for either ‘bimap’ or (‘first’ and ‘second’) • In the instance declaration for ‘Bifunctor Blah’ diff --git a/testsuite/tests/deriving/should_compile/deriving-via-compile.hs b/testsuite/tests/deriving/should_compile/deriving-via-compile.hs index 261110c255..7754b561d5 100644 --- a/testsuite/tests/deriving/should_compile/deriving-via-compile.hs +++ b/testsuite/tests/deriving/should_compile/deriving-via-compile.hs @@ -308,7 +308,7 @@ instance Biapplicative (,) where (f a b, f' a' b') newtype WrapBiapp p a b = WrapBiap (p a b) - deriving newtype (Bifunctor, Biapplicative, Eq) + deriving newtype (Functor, Bifunctor, Biapplicative, Eq) instance (Biapplicative p, Num a, Num b) => Num (WrapBiapp p a b) where (+) = biliftA2 (+) (+) |