Global time_facet< time_type, CharT, OutItrT >::duration_sign

Global time_facet< time_type, CharT, OutItrT >::duration_sign_always

boost::date_time::time_facet< time_type, CharT, OutItrT >::duration_sign_always

// In header: <boost/date_time/time_facet.hpp>

time_facet<  time_facet< time_type, CharT, OutItrT >::duration_sign_always;