[boost] date_time formatting

From: Martin (adrianm_at_[hidden])
Date: 2004-09-27 08:12:20

I'm trying to understand the date_time formatting via iostreams but got 
problems with a few things. I tried to search the archive but didn't find 
answers to these questions.

1. Why doesn't date_time use the standard time facet (time_put.do_put etc) if 
the special greg_date_facet isn't available?

2. Why do I need to specify the names of all months and weekdays in the 
greg_date_facet just to use a different separator than '-' or another ordering?

3. How do I specify the format of a ptime (date-separator, time-separator and 
decimal separator)?

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I also got some compile warnings on VC70 (latest CVS)

1: in the function "from_time_t" on this line
    return start + seconds(t);

  boost\date_time\posix_time\conversion.hpp(27) warning C4244: 'argument' : 
conversion from 'time_t' to 'long', possible loss of data

2: in the function "from_stream_type"
     ss << ss.narrow(*beg++, 'X'); // 'X' will cause exception to be thrown

  boost\date_time\date_parsing.hpp(211): warning C4244: 'argument' : 
conversion from 'wchar_t' to 'char', possible loss of data