-- | check if the attribue value is still undefined
--
-- * we also regard "don't care" attributes as undefined
--
isUndefStdAttr         :: AttrTable (StdAttr a) -> NodeInfo -> Bool
isUndefStdAttr atab at  = isUndef (getAttr atab at)
isUndefStdAttr         :: AttrTable (StdAttr a) -> NodeInfo -> Bool
isUndefStdAttr atab at  = isUndef (getAttr atab at)
isUndefStdAttr atab at  = isUndef (getAttr atab at)