id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
642,operator<< for gregorian::date_duration not found,zak-k,az_sw_dude,"{{{
The operator<< for boost::gregorian::date_duration (aka
gregorian::days) is not found by name lookup. This
appears to be because:


* boost::gregorian::date_duration is a typedef to:

    boost::date_time::date_duration<
boost::gregorian::date_duration_rep >

   where boost::gregorian::date_duration_rep is a
typedef to boost::date_time::duration_traits_adapted

  (defined in date_time/gregorian/greg_duration.hpp)


* operator<< for boost::gregorian::date_duration) is
defined in the gregorian namespace

  (defined in date_time/gregorian/gregorian_io.hpp)

However, since only the typedef names are in the
gregorian namespace, argument-dependent lookup doesn't
 find it there unless you add:

  using gregorian::operator<<;

to your code, after which the operator works as expected.


This occurs for me using both gcc 3.4.5 and 4.0.3, and
both with Boost 1.33.1 and current CVS trunk.


A possible solution would be to either move the
definition of operator<< to the date_time namespace, or
pull it into that namespace with a using declaration.


I haven't checked all the other gregorian types, but
it's possible that similer problems exist.
}}}",Bugs,closed,,date_time,None,Problem,fixed,,