X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Futils%2FLazyUniqFM.lhs;h=97451b0eea6afdc265408acde125e6adb12bf17f;hp=d8132e3cd5b11887a1efc0f20ef50347c2df7128;hb=4fa44a3ae9c36222ccb460ba3ed24e46bf7c70ae;hpb=68bc57c179fe4f1d739a435766bced7236b36261

diff --git a/compiler/utils/LazyUniqFM.lhs b/compiler/utils/LazyUniqFM.lhs
index d8132e3..97451b0 100644
--- a/compiler/utils/LazyUniqFM.lhs
+++ b/compiler/utils/LazyUniqFM.lhs
@@ -11,10 +11,11 @@ Basically, the things need to be in class @Uniquable@, and we use the
 @getUnique@ method to grab their @Uniques@.
 
 \begin{code}
-{-# OPTIONS -Wall -fno-warn-name-shadowing -Werror -fallow-undecidable-instances #-}
 module LazyUniqFM (
+	-- * Lazy unique-keyed mappings
 	UniqFM,   	-- abstract type
 
+	-- ** Manipulating those mappings
 	emptyUFM,
 	unitUFM,
 	unitDirectlyUFM,
@@ -177,9 +178,10 @@ ufmToList	:: UniqFM elt -> [(Unique, elt)]
 \begin{code}
 data Lazy a = Lazy { fromLazy :: a }
 
+-- | @UniqFM a@ is a mapping from Unique to @a@ where the element @a@ is evaluated lazily.
 newtype UniqFM ele = MkUniqFM (S.UniqFM (Lazy ele))
 
-instance Outputable (S.UniqFM (Lazy a)) => Outputable (UniqFM a) where
+instance Outputable a => Outputable (UniqFM a) where
     ppr (MkUniqFM fm) = ppr fm
 
 instance Outputable a => Outputable (Lazy a) where