Extended TyCon and friends to represent family declarations

[ghc-hetmet.git] / compiler / typecheck / TcSplice.lhs

diff --git a/compiler/typecheck/TcSplice.lhs b/compiler/typecheck/TcSplice.lhs
index 73d9b5a..a823884 100644 (file)
--- a/compiler/typecheck/TcSplice.lhs
+++ b/compiler/typecheck/TcSplice.lhs
@@ -585,9 +585,12 @@ reifyTyCon tc
   | isFunTyCon tc  = return (TH.PrimTyConI (reifyName tc) 2              False)
   | isPrimTyCon tc = return (TH.PrimTyConI (reifyName tc) (tyConArity tc) (isUnLiftedTyCon tc))
   | isSynTyCon tc
-  = do { let (tvs, rhs) = synTyConDefn tc
-       ; rhs' <- reifyType rhs
-       ; return (TH.TyConI $ TH.TySynD (reifyName tc) (reifyTyVars tvs) rhs') }
+  = case synTyConDefn tc of
+      Nothing         -> noTH SLIT("type family") (ppr tc)
+      Just (tvs, rhs) -> 
+        do { rhs' <- reifyType rhs
+          ; return (TH.TyConI $ 
+                      TH.TySynD (reifyName tc) (reifyTyVars tvs) rhs') }
 
 reifyTyCon tc
   = do         { cxt <- reifyCxt (tyConStupidTheta tc)