project-m36-0.8: src/lib/ProjectM36/AttributeNames.hs

module ProjectM36.AttributeNames where
import ProjectM36.Base
import qualified Data.Set as S
--AttributeNames is a data structure which can represent inverted projection attributes and attribute names derived from relational expressions

empty :: AttributeNamesBase a
empty = AttributeNames S.empty

all :: AttributeNamesBase a
all = InvertedAttributeNames S.empty