module assoc. import assoclists. kind pair type -> type -> type. type pair A -> B -> (pair A B). type assoc A -> B -> (list (pair A B)) -> o. (assoc X Y L) :- (memb (pair X Y) L).
module assoc. import assoclists. kind pair type -> type -> type. type pair A -> B -> (pair A B). type assoc A -> B -> (list (pair A B)) -> o. (assoc X Y L) :- (memb (pair X Y) L).