[Boost-users] Re: date_time formatting compilation error

From: Keith MacDonald (boost_at_[hidden])
Date: 2004-03-14 11:07:41

Thanks for your response.

I get the same results whatever I try, including with testgreg_wstream.cpp.
The only way I've been able to get my code working is to define
BOOST_DATE_TIME_NO_WSTRING_CONVERSIONS, and then convert to wchar_t myself.

I'm pretty sure my CVS files are up to date, but here's a directory listing
(in dd/mm/yyyy format), just in case:

18/02/2004  17:49 5,731 formatters.hpp
15/02/2004  16:17 2,845 formatters_limited.hpp
18/02/2004  17:49 1,006 gregorian.hpp
02/12/2003  15:14 3,107 gregorian_types.hpp
02/12/2003  15:14 1,572 greg_calendar.hpp
12/01/2004  16:42 3,824 greg_date.hpp
02/12/2003  15:14 1,826 greg_day.hpp
02/12/2003  15:14 1,078 greg_day_of_year.hpp
02/12/2003  15:14   922 greg_duration.hpp
01/03/2004  16:58 8,288 greg_facet.hpp
18/02/2004  17:49 2,911 greg_month.hpp
18/02/2004  17:49 1,897 greg_weekday.hpp
02/12/2003  15:14 1,648 greg_year.hpp
02/12/2003  15:14   904 greg_ymd.hpp
01/03/2004  16:58 3,195 parsers.hpp

- Keith MacDonald

"Jeff Garland" <jeff_at_[hidden]> wrote in message
news:20040314143154.M74344_at_crystalclearsoftware.com...
> On Sun, 14 Mar 2004 12:27:55 -0000, Keith MacDonald wrote
> > I'm trying to convert a gregorian::date to a string, as shown in the
> > following code:
> >
> > // Build: cl /EHsc /I \CVS\boost dt.cpp
> > #include <iostream>
> > #include <boost/date_time/gregorian/gregorian.hpp>
> > int main()
> > {
> >    boost::gregorian::date today(2004, boost::gregorian::Mar, 14);
> >
> >    std::cout << today << std::endl;
> >    return 0;
> > }
>
> This definately should work.  What happens if you do
>   std::cout << to_simple_string(today) << std::endl;
> or
>   std::wcout << to_simple_wstring(today) << std::endl;
>
> > When I compile it with Visual C++ 7.1, using Boost from CVS head,
>
> Are you positive about this?  Changes to support wide streaming went in a
> couple weeks back.  Seems like maybe you don't have all of that change.
>
> > I
> > get the following error:
> >
> > \CVS\boost\boost\lexical_cast.hpp(150) : error C2679: binary '>>' :
> > no operator found which takes a right-hand operand of type
> 'boost::date_time::date_formatter
> > <date_type,format_type,charT>::string_type' (or there is no
> > acceptable conversion)        with        [
> > date_type=boost::gregorian::date,
> > format_type=boost::date_time::simple_format,
> >  charT=wchar_t        ]
> >
> > The same thing happens when using to_simple_string and
> > to_simple_string_type<char>, rather than operator<<.  I actually
> > want the result as a basic_string<wchar_t>, but all variations
> > produce this same error.  What am I doing wrong?
>
> I really don't know.  Can you try running the regression tests in your
> environment?  In particular I'm interested in
>
> libs/date_time/test/gregorian/testgreg_wstream.cpp
>
> Anyway, judging from the regression tests this should be working for
you...
>
> Jeff