nt_0 ;                                                            typedef CGAL_SS_i::Exceptionless_filtered_construction< typename Unfiltering::Construct_ss_event_time_and_point_0                                                         , typename Exact      ::Construct_ss_event_time_and_point_0                                                         , typename Unfiltering::Construct_ss_event_time_and_point_0                                                          , C0E                                                         , C0C                                                          , E0C                                                         , C0C                                                          >                                                         Construct_ss_event_time_and_point_0 ; } ;  template<class K> class Polygon_offset_builder_traits_0