X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Futils%2FPretty.lhs;h=3e08814ceb9f07b6d3972fe5554fbeaf7cb59aca;hb=8ffd91b6102f4ad3111cabdf6bdb1998f257887f;hp=7aec715d7a2ba3276d0d4263e5331492ee4d26e4;hpb=66b17554b1415df8e505793802ccd14dee66d6db;p=ghc-hetmet.git

diff --git a/compiler/utils/Pretty.lhs b/compiler/utils/Pretty.lhs
index 7aec715..3e08814 100644
--- a/compiler/utils/Pretty.lhs
+++ b/compiler/utils/Pretty.lhs
@@ -176,7 +176,8 @@ module Pretty (
         hang, punctuate,
 
 --      renderStyle,            -- Haskell 1.3 only
-        render, fullRender, printDoc, showDocWith
+        render, fullRender, printDoc, showDocWith,
+        bufLeftRender -- performance hack
   ) where
 
 import BufWrite
@@ -1042,9 +1043,12 @@ hPutLitString handle a l = if l ==# _ILIT(0)
 printLeftRender :: Handle -> Doc -> IO ()
 printLeftRender hdl doc = do
   b <- newBufHandle hdl
-  layLeft b (reduceDoc doc)
+  bufLeftRender b doc
   bFlush b
 
+bufLeftRender :: BufHandle -> Doc -> IO ()
+bufLeftRender b doc = layLeft b (reduceDoc doc)
+
 -- HACK ALERT!  the "return () >>" below convinces GHC to eta-expand
 -- this function with the IO state lambda.  Otherwise we end up with
 -- closures in all the case branches.