diff options
| author | Herbert Valerio Riedel <hvr@gnu.org> | 2015-03-07 11:10:34 +0100 |
|---|---|---|
| committer | Herbert Valerio Riedel <hvr@gnu.org> | 2015-03-07 11:10:53 +0100 |
| commit | eb3661f2b9f8472f3714774126ebe1183484dd85 (patch) | |
| tree | 2153640f3a87a099ea1bcd399f327fb8600c7ebc /testsuite/tests/parser/should_compile | |
| parent | 1965202febe27949a027dea90c0f0040fd9236e7 (diff) | |
| download | haskell-eb3661f2b9f8472f3714774126ebe1183484dd85.tar.gz | |
Re-export `<$>` from Prelude (#10113)
Whether to re-export the `<$>` non-method operator from `Prelude` wasn't
explicitly covered in the original AMP proposal[1], but it turns out that
not doing so forces most code that makes use of applicatives to import
`Data.Functor` or `Control.Applicative` just to get that operator into
scope. To this end, it was proposed to add `<$>` to Prelude as well[2].
The down-side is that this increases the amount of redundant-import
warnings triggered, as well as the relatively minor issue of stealing
the `<$>` operator from the default namespace for good (although at this
point `<$>` is supposed to be ubiquitous anyway due to `Applicative`
being implicitly required into the next Haskell Report)
[1]: https://wiki.haskell.org/Functor-Applicative-Monad_Proposal
[2]: http://thread.gmane.org/gmane.comp.lang.haskell.libraries/24161
Reviewed By: austin, ekmett
Differential Revision: https://phabricator.haskell.org/D680
Diffstat (limited to 'testsuite/tests/parser/should_compile')
| -rw-r--r-- | testsuite/tests/parser/should_compile/T7476/T7476.hs | 2 | ||||
| -rw-r--r-- | testsuite/tests/parser/should_compile/T7476/T7476.stdout | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/testsuite/tests/parser/should_compile/T7476/T7476.hs b/testsuite/tests/parser/should_compile/T7476/T7476.hs index 34ac453752..48f2f1e734 100644 --- a/testsuite/tests/parser/should_compile/T7476/T7476.hs +++ b/testsuite/tests/parser/should_compile/T7476/T7476.hs @@ -1,2 +1,2 @@ import Control.Applicative -main = show <$> pure 1 >>= print +main = (pure 1 >>= print) <**> pure show diff --git a/testsuite/tests/parser/should_compile/T7476/T7476.stdout b/testsuite/tests/parser/should_compile/T7476/T7476.stdout index f6e15d592e..a66ff2f16a 100644 --- a/testsuite/tests/parser/should_compile/T7476/T7476.stdout +++ b/testsuite/tests/parser/should_compile/T7476/T7476.stdout @@ -1 +1 @@ -import Control.Applicative ( (<$>) ) +import Control.Applicative ( (<**>) ) |