make some Applicative functions into methods, and split off Data.Functor (proposal...

[ghc-base.git] / Data / Functor.hs

diff --git a/Data/Functor.hs b/Data/Functor.hs
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+++ b/Data/Functor.hs
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+-----------------------------------------------------------------------------
+-- |
+-- Module      :  Data.Functor
+-- Copyright   :  (c) The University of Glasgow 2001
+-- License     :  BSD-style (see the file libraries/base/LICENSE)
+-- 
+-- Maintainer  :  libraries@haskell.org
+-- Stability   :  provisional
+-- Portability :  portable
+--
+-- Functors: uniform action over a parameterized type, generalizing the
+-- 'map' function on lists.
+
+module Data.Functor
+    (
+      Functor(fmap, (<$)),
+      (<$>),
+    ) where
+
+#ifdef __GLASGOW_HASKELL__
+import GHC.Base (Functor(..))
+#endif
+
+infixl 4 <$>
+
+-- | An infix synonym for 'fmap'.
+(<$>) :: Functor f => (a -> b) -> f a -> f b
+(<$>) = fmap