From 58d0b1faf2ea388c695fdaf55d80af9b87482572 Mon Sep 17 00:00:00 2001
From: "simonpj@microsoft.com" <unknown>
Date: Fri, 4 Jan 2008 10:54:50 +0000
Subject: [PATCH] A little refactoring of GenIfaceEq to make the Outputable
 instance into H98

---
 compiler/iface/IfaceSyn.lhs |    9 +++++----
 compiler/iface/MkIface.lhs  |    4 ++--
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/compiler/iface/IfaceSyn.lhs b/compiler/iface/IfaceSyn.lhs
index 8786371..2d650c1 100644
--- a/compiler/iface/IfaceSyn.lhs
+++ b/compiler/iface/IfaceSyn.lhs
@@ -38,6 +38,7 @@ import IfaceType
 import NewDemand
 import Class
 import UniqFM
+import UniqSet
 import NameSet 
 import Name
 import CostCentre
@@ -663,14 +664,14 @@ Of course, equality is also done modulo alpha conversion.
 data GenIfaceEq a
   = Equal 		-- Definitely exactly the same
   | NotEqual		-- Definitely different
-  | EqBut a       -- The same provided these Names have not changed
+  | EqBut (UniqSet a)   -- The same provided these things have not changed
 
-type IfaceEq = GenIfaceEq NameSet
+type IfaceEq = GenIfaceEq Name
 
-instance Outputable IfaceEq where
+instance Outputable a => Outputable (GenIfaceEq a) where
   ppr Equal          = ptext SLIT("Equal")
   ppr NotEqual       = ptext SLIT("NotEqual")
-  ppr (EqBut occset) = ptext SLIT("EqBut") <+> ppr (nameSetToList occset)
+  ppr (EqBut occset) = ptext SLIT("EqBut") <+> ppr (uniqSetToList occset)
 
 bool :: Bool -> IfaceEq
 bool True  = Equal
diff --git a/compiler/iface/MkIface.lhs b/compiler/iface/MkIface.lhs
index e569c47..80ef6d0 100644
--- a/compiler/iface/MkIface.lhs
+++ b/compiler/iface/MkIface.lhs
@@ -729,7 +729,7 @@ computeChangedOccs ver_fn this_module old_usages eq_info
     usg_modmap = listToUFM [ (usg_name usg, listToUFM (usg_entities usg))
                            | usg <- old_usages ]
 
-    get_local_eq_info :: GenIfaceEq NameSet -> GenIfaceEq OccSet
+    get_local_eq_info :: GenIfaceEq Name -> GenIfaceEq OccName
     get_local_eq_info Equal = Equal
     get_local_eq_info NotEqual = NotEqual
     get_local_eq_info (EqBut ns) = foldNameSet f Equal ns
@@ -759,7 +759,7 @@ computeChangedOccs ver_fn this_module old_usages eq_info
         where (occs, iface_eqs) = unzip pairs
     add_changes so_far other = so_far
 
-type OccIfaceEq = GenIfaceEq OccSet
+type OccIfaceEq = GenIfaceEq OccName
 
 instance Outputable OccIfaceEq where
   ppr Equal          = ptext SLIT("Equal")
-- 
1.7.10.4