X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Ftypes%2FType.lhs;h=ab47c4c8427bc8531de729bf2c75ed059ae8bc51;hp=8c969226d8db098008a491c55e318c7bbc73eace;hb=4ff3da9aa11dc1c5d00f03248dc41c7d84309fa1;hpb=4f56b4074079380d4b115a05d5aa71004f716710

diff --git a/compiler/types/Type.lhs b/compiler/types/Type.lhs
index 8c96922..ab47c4c 100644
--- a/compiler/types/Type.lhs
+++ b/compiler/types/Type.lhs
@@ -67,8 +67,8 @@ module Type (
 	newTyConInstRhs,
 
 	-- Lifting and boxity
-	isUnLiftedType, isUnboxedTupleType, isAlgType, isPrimitiveType,
-	isStrictType, isStrictPred, 
+	isUnLiftedType, isUnboxedTupleType, isAlgType, isClosedAlgType,
+	isPrimitiveType, isStrictType, isStrictPred, 
 
 	-- Free variables
 	tyVarsOfType, tyVarsOfTypes, tyVarsOfPred, tyVarsOfTheta,
@@ -861,10 +861,19 @@ isUnboxedTupleType ty = case splitTyConApp_maybe ty of
 
 -- Should only be applied to *types*; hence the assert
 isAlgType :: Type -> Bool
-isAlgType ty = case splitTyConApp_maybe ty of
-			Just (tc, ty_args) -> ASSERT( ty_args `lengthIs` tyConArity tc )
-					      isAlgTyCon tc
-			other		   -> False
+isAlgType ty 
+  = case splitTyConApp_maybe ty of
+      Just (tc, ty_args) -> ASSERT( ty_args `lengthIs` tyConArity tc )
+			    isAlgTyCon tc
+      _other	         -> False
+
+-- Should only be applied to *types*; hence the assert
+isClosedAlgType :: Type -> Bool
+isClosedAlgType ty
+  = case splitTyConApp_maybe ty of
+      Just (tc, ty_args) -> ASSERT( ty_args `lengthIs` tyConArity tc )
+			    isAlgTyCon tc && not (isOpenTyCon tc)
+      _other	         -> False
 \end{code}
 
 @isStrictType@ computes whether an argument (or let RHS) should