+-- | Evaluate a core Type representing type level int from the TypeLevel
+-- library to a real int.
+-- eval_type_level_int :: Type.Type -> Int
+-- eval_type_level_int ty =
+-- unsafeRunGhc $ do
+-- -- Automatically import modules for any fully qualified identifiers
+-- setDynFlag DynFlags.Opt_ImplicitImportQualified
+--
+-- let to_int_name = mkRdrName "Data.TypeLevel.Num.Sets" "toInt"
+-- let to_int = SrcLoc.noLoc $ HsExpr.HsVar to_int_name
+-- let undef = hsTypedUndef $ coreToHsType ty
+-- let app = HsExpr.HsApp (to_int) (undef)
+--
+-- core <- toCore [] app
+-- execCore core
+
+-- | Get the length of a FSVec type
+tfvec_len :: Type.Type -> Int
+tfvec_len ty =
+ eval_tfp_int len
+ where
+ (tycon, args) = Type.splitTyConApp ty
+ [len, el_ty] = args
+
+-- Is this a wild binder?
+is_wild :: CoreSyn.CoreBndr -> Bool
+-- wild binders have a particular unique, that we copied from MkCore.lhs to
+-- here. However, this comparison didn't work, so we'll just check the
+-- occstring for now... TODO
+--(Var.varUnique bndr) == (Unique.mkBuiltinUnique 1)
+is_wild bndr = "wild" == (OccName.occNameString . Name.nameOccName . Var.varName) bndr
+
+-- Is the given core expression a lambda abstraction?
+is_lam :: CoreSyn.CoreExpr -> Bool
+is_lam (CoreSyn.Lam _ _) = True
+is_lam _ = False
+
+-- Is the given core expression of a function type?
+is_fun :: CoreSyn.CoreExpr -> Bool
+-- Treat Type arguments differently, because exprType is not defined for them.
+is_fun (CoreSyn.Type _) = False
+is_fun expr = (Type.isFunTy . CoreUtils.exprType) expr
+
+-- Is the given core expression polymorphic (i.e., does it accept type
+-- arguments?).
+is_poly :: CoreSyn.CoreExpr -> Bool
+-- Treat Type arguments differently, because exprType is not defined for them.
+is_poly (CoreSyn.Type _) = False
+is_poly expr = (Maybe.isJust . Type.splitForAllTy_maybe . CoreUtils.exprType) expr
+
+-- Is the given core expression a variable reference?
+is_var :: CoreSyn.CoreExpr -> Bool
+is_var (CoreSyn.Var _) = True
+is_var _ = False
+
+-- Can the given core expression be applied to something? This is true for
+-- applying to a value as well as a type.
+is_applicable :: CoreSyn.CoreExpr -> Bool
+is_applicable expr = is_fun expr || is_poly expr
+
+-- Does the given CoreExpr have any free type vars?
+has_free_tyvars :: CoreSyn.CoreExpr -> Bool
+has_free_tyvars = not . VarSet.isEmptyVarSet . (CoreFVs.exprSomeFreeVars Var.isTyVar)