Jeff Garland wrote: > On Wed, 03 Sep 2003 17:09:08 -0400, Philip Miller wrote > > David Abrahams wrote: > > > > > I'm trying to get a ptime relative to 1/1/1970, so I did: > > > > > > using namespace boost::date_time; > > > ptime d; > > > ... > > > boost::posix_time::time_duration since_1970 = d - 1/Jan/1970; > > > > > > Error. > > > > > > Since it is a completely lossless conversion (like an upcast), I'd > > > like to see boost::date -> boost::posix_time::ptime implicit > > > conversions added. > > > > Can you elaborate on the problem? I, too, am doing lots of > > I believe that Dave is asking for a non-explicit constructor for > ptime from date. But he is also using an expression template extension > to allow the 1/Jan/1970 to compile.
I have grown to dislike non-explicit constructors, so I like the current interface. I also greatly prefer the syntax of date(1970,1,1) to 1/Jan/1970. Just my two cents. > > So, I would like to see a standard time_duration accessor that returns > microseconds rather than the > > compile-time dependent fractional_seconds. > > I think what you want is really 'total_microseconds', right? hours, minutes, > and seconds provide a 'normalized count' which is really for 'breakdown > printing' (eg: 10:09:08). And presumably if your time_duration was using > nanoseconds you might what total_microseconds to round up/down appropriately? No, I am simply looking for an easy way to convert between boost::date_time ptime and time_duration instances to the conventional 64-bit seconds/microseconds since 1/1/1970 representation of time. So, what I really want (at least I think I want) are total_seconds, fractional_microseconds member methods to time_duration. No rounding would be required for total_seconds, but rounding would be required for fractional_microseconds. I hope this makes sense, and please take my comments as minor suggestions for what has proven to be a great library for me to use in my applications. Thanks for your effort! Thanks, Phil _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
