);          CGAL_stskel_intrinsic_test_assertion(!p || (p && !is_point_calculation_clearly_wrong(aT,*p,aE0,aE0)));          return p ;   }      result_type calc ( FT               const& aT                    , Segment_0        const& aE0                    , Segment_0        const& aE0                     , Trisegment_0_ptr const& aNode                    , Tag_