X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Futils%2FOutputable.lhs;h=73c6bd3fc2a623aee4a1f4813ef92564ae246c4c;hb=5a185e27def3ee8ace1704235eb277bc60c38618;hp=7a643d7eb40fb210f6164bb1a729d4507227793d;hpb=d2ce0f52d42edf32bb9f13796e6ba6edba8bd516;p=ghc-hetmet.git

diff --git a/compiler/utils/Outputable.lhs b/compiler/utils/Outputable.lhs
index 7a643d7..73c6bd3 100644
--- a/compiler/utils/Outputable.lhs
+++ b/compiler/utils/Outputable.lhs
@@ -75,6 +75,8 @@ import Pretty		( Doc, Mode(..) )
 import Panic
 
 import Data.Char
+import Data.Map (Map)
+import qualified Data.Map as M
 import Data.Word
 import System.IO	( Handle, stderr, stdout, hFlush )
 import System.FilePath
@@ -564,6 +566,9 @@ instance (Outputable a, Outputable b, Outputable c, Outputable d, Outputable e)
 instance Outputable FastString where
     ppr fs = ftext fs		-- Prints an unadorned string,
 				-- no double quotes or anything
+
+instance (Outputable key, Outputable elt) => Outputable (Map key elt) where
+    ppr m = ppr (M.toList m)
 \end{code}
 
 %************************************************************************