X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Ftypes%2FTypeRep.lhs;h=85514091a4bcc06d38ae5c59c044292feea851c4;hp=8322e9d425e671fe13dd6e97c68bedac36cc2942;hb=46809fa91667e952afe016e4cd704b21274241b4;hpb=ebff59fc35239fffad714f5414e83208ccd2a458

diff --git a/compiler/types/TypeRep.lhs b/compiler/types/TypeRep.lhs
index 8322e9d..8551409 100644
--- a/compiler/types/TypeRep.lhs
+++ b/compiler/types/TypeRep.lhs
@@ -455,8 +455,8 @@ pprTheta theta  = parens (sep (punctuate comma (map pprPred theta)))
 pprThetaArrow :: ThetaType -> SDoc
 pprThetaArrow []     = empty
 pprThetaArrow [pred] 
-  | noParenPred pred = pprPred pred <+> ptext (sLit "=>")
-pprThetaArrow preds  = parens (sep (punctuate comma (map pprPred preds))) <+> ptext (sLit "=>")
+  | noParenPred pred = pprPred pred <+> darrow
+pprThetaArrow preds  = parens (sep (punctuate comma (map pprPred preds))) <+> darrow
 
 noParenPred :: PredType -> Bool
 -- A predicate that can appear without parens before a "=>"
@@ -503,8 +503,11 @@ ppr_type p (FunTy ty1 ty2)
     maybeParen p FunPrec $
     sep (ppr_type FunPrec ty1 : ppr_fun_tail ty2)
   where
-    ppr_fun_tail (FunTy ty1 ty2) = (arrow <+> ppr_type FunPrec ty1) : ppr_fun_tail ty2
-    ppr_fun_tail other_ty        = [arrow <+> pprType other_ty]
+    ppr_fun_tail (FunTy ty1 ty2) 
+      | not (is_pred ty1) = (arrow <+> ppr_type FunPrec ty1) : ppr_fun_tail ty2
+    ppr_fun_tail other_ty = [arrow <+> pprType other_ty]
+    is_pred (PredTy {}) = True
+    is_pred _           = False
 
 ppr_forall_type :: Prec -> Type -> SDoc
 ppr_forall_type p ty
@@ -581,7 +584,7 @@ pprTvBndr tv | isLiftedTypeKind kind = ppr tv
 
 Note [Infix type variables]
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
-In Haskell 98 you can say
+With TypeOperators you can say
 
    f :: (a ~> b) -> b