[project @ 2005-03-10 14:03:28 by simonmar]

[ghc-hetmet.git] / ghc / compiler / types / Class.lhs

diff --git a/ghc/compiler/types/Class.lhs b/ghc/compiler/types/Class.lhs
index 3ecb8f8..3385adc 100644 (file)
--- a/ghc/compiler/types/Class.lhs
+++ b/ghc/compiler/types/Class.lhs
@@ -55,14 +55,14 @@ data Class
 type FunDep a    = ([a],[a])   --  e.g. class C a b c |  a b -> c, a c -> b  where ...
                                --  Here fun-deps are [([a,b],[c]), ([a,c],[b])]
 
-type ClassOpItem = (Id, DefMeth Id)
+type ClassOpItem = (Id, DefMeth)
        -- Selector function; contains unfolding
        -- Default-method info
 
-data DefMeth id = NoDefMeth            -- No default method
-               | DefMeth id            -- A polymorphic default method (named id)
-               | GenDefMeth            -- A generic default method
-                deriving Eq  
+data DefMeth = NoDefMeth               -- No default method
+            | DefMeth                  -- A polymorphic default method
+            | GenDefMeth               -- A generic default method
+             deriving Eq  
 \end{code}
 
 The @mkClass@ function fills in the indirect superclasses.
@@ -149,6 +149,11 @@ instance Outputable Class where
 
 instance Show Class where
     showsPrec p c = showsPrecSDoc p (ppr c)
+
+instance Outputable DefMeth where
+    ppr DefMeth     =  text "{- has default method -}"
+    ppr GenDefMeth  =  text "{- has generic method -}"
+    ppr NoDefMeth   =  empty   -- No default method
 \end{code}