X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Futils%2FBag.lhs;h=2e50e00f8845f69e4d70080361bd978aa1d1b7d5;hb=aafdba3bce91afb003f5f50e001e141744837bae;hp=b107f84a3a43ffcf04a9c9c5fd8ae6ef5ed5a5b8;hpb=0065d5ab628975892cea1ec7303f968c3338cbe1;p=ghc-hetmet.git

diff --git a/compiler/utils/Bag.lhs b/compiler/utils/Bag.lhs
index b107f84..2e50e00 100644
--- a/compiler/utils/Bag.lhs
+++ b/compiler/utils/Bag.lhs
@@ -1,9 +1,18 @@
 %
+% (c) The University of Glasgow 2006
 % (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
 %
-\section[Bags]{@Bag@: an unordered collection with duplicates}
+
+Bag: an unordered collection with duplicates
 
 \begin{code}
+{-# OPTIONS -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+--     http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
+-- for details
+
 module Bag (
 	Bag,	-- abstract type
 
@@ -20,7 +29,8 @@ module Bag (
 
 import Outputable
 import Util		( isSingleton )
-import List		( partition )
+
+import Data.List	( partition )
 \end{code}
 
 
@@ -170,8 +180,5 @@ bagToList b = foldrBag (:) [] b
 
 \begin{code}
 instance (Outputable a) => Outputable (Bag a) where
-    ppr EmptyBag	= ptext SLIT("emptyBag")
-    ppr (UnitBag a)     = ppr a
-    ppr (TwoBags b1 b2) = hsep [ppr b1 <> comma, ppr b2]
-    ppr (ListBag as)    = interpp'SP as
+    ppr bag = char '<' <> pprWithCommas ppr (bagToList bag) <> char '>'
 \end{code}