[project @ 2004-11-10 04:17:50 by wolfgang]

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

diff --git a/ghc/compiler/types/Class.lhs b/ghc/compiler/types/Class.lhs
index 2b7ce52..3385adc 100644 (file)
--- a/ghc/compiler/types/Class.lhs
+++ b/ghc/compiler/types/Class.lhs
@@ -10,8 +10,7 @@ module Class (
 
        mkClass, classTyVars, classArity,
        classKey, className, classSelIds, classTyCon,
-       classBigSig, classExtraBigSig, classTvsFds, classSCTheta,
-       classHasFDs
+       classBigSig, classExtraBigSig, classTvsFds, classSCTheta
     ) where
 
 #include "HsVersions.h"
@@ -56,14 +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.
@@ -114,9 +113,6 @@ classExtraBigSig (Class {classTyVars = tyvars, classFunDeps = fundeps,
                         classSCTheta = sc_theta, classSCSels = sc_sels,
                         classOpStuff = op_stuff})
   = (tyvars, fundeps, sc_theta, sc_sels, op_stuff)
-
-classHasFDs :: Class -> Bool
-classHasFDs (Class {classFunDeps = fundeps}) = not (null fundeps)
 \end{code}
 
 
@@ -153,6 +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}