X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Ftypecheck%2FInst.lhs;h=9c152e189e3f8a8b3eee3dffd8f413cf9d33ad48;hp=13b8be80b8fdcd3f3bb9ea3de8237bba4bd7d0b2;hb=6d2b0ae3ae3296cb6cdd496cbf85b897c7ce150b;hpb=bbd67a5f4f3515ea5c37711815b2f6ad58cbd655

diff --git a/compiler/typecheck/Inst.lhs b/compiler/typecheck/Inst.lhs
index 13b8be8..9c152e1 100644
--- a/compiler/typecheck/Inst.lhs
+++ b/compiler/typecheck/Inst.lhs
@@ -42,7 +42,8 @@ module Inst (
 	isTyVarDict, isMethodFor, 
 
 	zonkInst, zonkInsts,
-	instToId, instToVar, instType, instName,
+	instToId, instToVar, instType, instName, instToDictBind,
+	addInstToDictBind,
 
 	InstOrigin(..), InstLoc, pprInstLoc,
 
@@ -91,6 +92,7 @@ import PrelNames
 import BasicTypes
 import SrcLoc
 import DynFlags
+import Bag
 import Maybes
 import Util
 import Outputable
@@ -205,6 +207,15 @@ tyVarsOfInst (EqInst {tci_left = ty1, tci_right = ty2}) = tyVarsOfType ty1 `unio
 
 tyVarsOfInsts insts = foldr (unionVarSet . tyVarsOfInst) emptyVarSet insts
 tyVarsOfLIE   lie   = tyVarsOfInsts (lieToList lie)
+
+
+--------------------------
+instToDictBind :: Inst -> LHsExpr TcId -> TcDictBinds
+instToDictBind inst rhs 
+  = unitBag (L (instSpan inst) (VarBind (instToId inst) rhs))
+
+addInstToDictBind :: TcDictBinds -> Inst -> LHsExpr TcId -> TcDictBinds
+addInstToDictBind binds inst rhs = binds `unionBags` instToDictBind inst rhs
 \end{code}
 
 Predicates
@@ -1005,7 +1016,7 @@ mkEqInst (EqPred ty1 ty2) co
 
 mkWantedEqInst :: PredType -> TcM Inst
 mkWantedEqInst pred@(EqPred ty1 ty2)
-  = do { cotv <- newMetaTyVar TauTv (mkCoKind ty1 ty2)
+  = do { cotv <- newMetaCoVar ty1 ty2
        ; mkEqInst pred (Left cotv)
        }