[boost] Re: [date_time] serialization with bcc32

I think my solution is better as it uses the latestest spirit in cases where it should work. and uses 1.6 only when necessary. Russell Hind wrote:

We're just replaced the boost\spirit.hpp and boost\spirit folder with the 1.6.x distro as we use spirit elsewhere and haven't hit any problems doing this. We primarily use xml_archive at the moment.