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| author | Alexander Berntsen <alexander@plaimi.net> | 2014-04-17 21:43:35 +0200 |
|---|---|---|
| committer | Herbert Valerio Riedel <hvr@gnu.org> | 2014-04-19 11:47:52 +0200 |
| commit | 1bf6c0e482cfe4b9dfa0b5ed18a5741ba44fc226 (patch) | |
| tree | b564700cb689143fd3e46ee347a2893250dcce9e | |
| parent | 1d2ffb6ab1ef973c85f893b5ea4a72cfa59ce484 (diff) | |
| download | haskell-1bf6c0e482cfe4b9dfa0b5ed18a5741ba44fc226.tar.gz | |
Add reverse application operator Data.Function.(&)
Add `&` as the reverse application operator with `infixl 1`, which allows
it to be nested in `$` (re #9008).
Approved by the core libraries committee on 2013-10-14.
This also bumps the `base` version number to 4.7.1.0
| -rw-r--r-- | libraries/base/Data/Function.hs | 11 | ||||
| -rw-r--r-- | libraries/base/base.cabal | 2 | ||||
| -rw-r--r-- | libraries/base/changelog.md | 8 |
3 files changed, 19 insertions, 2 deletions
diff --git a/libraries/base/Data/Function.hs b/libraries/base/Data/Function.hs index 54eabbb6e7..afb6e5693a 100644 --- a/libraries/base/Data/Function.hs +++ b/libraries/base/Data/Function.hs @@ -4,6 +4,7 @@ -- | -- Module : Data.Function -- Copyright : Nils Anders Danielsson 2006 +-- , Alexander Berntsen 2014 -- License : BSD-style (see the LICENSE file in the distribution) -- -- Maintainer : libraries@haskell.org @@ -18,6 +19,7 @@ module Data.Function ( -- * "Prelude" re-exports id, const, (.), flip, ($) -- * Other combinators + , (&) , fix , on ) where @@ -25,6 +27,7 @@ module Data.Function import Prelude infixl 0 `on` +infixl 1 & -- | @'fix' f@ is the least fixed point of the function @f@, -- i.e. the least defined @x@ such that @f x = x@. @@ -86,3 +89,11 @@ fix f = let x = f x in x on :: (b -> b -> c) -> (a -> b) -> a -> a -> c (.*.) `on` f = \x y -> f x .*. f y + +-- | '&' is a reverse application operator. This provides notational +-- convenience. Its precedence is one higher than that of the forward +-- application operator '$', which allows '&' to be nested in '$'. +-- +-- /Since: 4.7.1.0/ +(&) :: a -> (a -> b) -> b +x & f = f x diff --git a/libraries/base/base.cabal b/libraries/base/base.cabal index f8937dcb1d..22b40db3c3 100644 --- a/libraries/base/base.cabal +++ b/libraries/base/base.cabal @@ -1,5 +1,5 @@ name: base -version: 4.7.0.0 +version: 4.7.1.0 -- GHC 7.6.1 released with 4.6.0.0 license: BSD3 license-file: LICENSE diff --git a/libraries/base/changelog.md b/libraries/base/changelog.md index c88c79edb4..75e7710d55 100644 --- a/libraries/base/changelog.md +++ b/libraries/base/changelog.md @@ -1,6 +1,12 @@ # Changelog for [`base` package](http://hackage.haskell.org/package/base) -## 4.7.0.0 *Feb 2014* +## 4.7.1.0 *TBA* + + * Bundled with GHC 7.10.1 + + * Add reverse application operator `Data.Function.(&)` + +## 4.7.0.0 *Apr 2014* * Bundled with GHC 7.8.1 |