// new virtual functions which can be overridden by derived classes
//////////
-/** Left hand side of relational. */
-ex relational::lhs() const
-{
- return lh;
-}
-
-/** Right hand side of relational. */
-ex relational::rhs() const
-{
- return rh;
-}
+// none
//////////
// non-virtual functions in this class