[commit: ghc] master: Add Functor Bag instance (2ca8cf6)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/2ca8cf69c50f6fcae17fdcbbcad16227519e5d02/ghc

>---------------------------------------------------------------

commit 2ca8cf69c50f6fcae17fdcbbcad16227519e5d02
Author: Ben Gamari <ben at smart-cactus.org>
Date:   Thu Oct 19 13:25:02 2017 -0400

    Add Functor Bag instance


>---------------------------------------------------------------

2ca8cf69c50f6fcae17fdcbbcad16227519e5d02
 compiler/utils/Bag.hs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/compiler/utils/Bag.hs b/compiler/utils/Bag.hs
index a027db2..af5caad 100644
--- a/compiler/utils/Bag.hs
+++ b/compiler/utils/Bag.hs
@@ -330,5 +330,8 @@ instance Data a => Data (Bag a) where
   dataTypeOf _ = mkNoRepType "Bag"
   dataCast1 x  = gcast1 x
 
+instance Functor Bag where
+    fmap = mapBag
+
 instance Foldable.Foldable Bag where
     foldr = foldrBag