RE: [Boost-Users] Newbie missing a header for boost_date_time?

From: Jeff Garland (jeff_at_[hidden])
Date: 2003-07-25 10:49:24

Dick B. wrote:
> I'm pretty sure the headers are being found.  If I replace posix_time.hpp
> with posix_time_types.hpp, the error and many of the warnings disappear.
> In other words...

Ok. 

> #include <boost/date_time/gregorian/gregorian.hpp>
> //#include <boost/date_time/posix_time/posix_time.hpp>
> #include <boost/date_time/posix_time/posix_time_types.hpp>
> 
> avoids the error message.

This is because commenting out 'posix_time.hpp' eliminates the
I/O code from the library.  This is the part that uses
lexical_cast which is where the error is occuring.

> ...which refers to lexical_cast.hpp
> 
>     template<typename Target, typename Source>
>     class lexical_stream
>     {
>         bool operator<<(const Source &input)
>         {
> here ===>   return stream << input;    <==== here
>         }
>     }
> 
> So I assume there's a header somewhere that defines the '<<' operator
> referred to.  I don't know if this is related to my use of VC7.1 or not.
> I'm trying to find someone around here with VC7 to build boost_1_30_0 and
> see if that makes a difference.  No luck so far.

I'm starting to think this may be related to the 1_30_0 lexical cast
problem.  Can you upgrade lexical_cast.hpp from cvs?  You can download
it from here:

http://cvs.sourceforge.net/cgi-
bin/viewcvs.cgi/boost/boost/boost/lexical_cast.hpp

Jeff