[Boost-users] Date-time - How to handle mixed instances of floating, UTC and local times

From: Mike Higginbottom (mike_at_[hidden])
Date: 2007-07-17 05:07:23

I have an application that needs to deal with floating time, UTC and local  
time. I can use ptime to represent floating and UTC but there's then no  
way to tell, for a given ptime instance, whether it represents a floating  
time or UTC. I could use local_time with a null tz to represent UTC or  
floating (seems like a hack and still only allows me one or the other  
representation) and a non-null tz for local times. Given only two 'time'  
classes (ptime and local_time) what's the best way to represent three  
different time concepts? Should I inherit from local_time to give me my  
three representations?

-- 
Mike Higginbottom
Paul Smith Computer Services
Silk Mill House
196 Huddersfield Road
Meltham
Holmfirth
HD9 4AW
United Kingdom
http://www.pscs.co.uk
[phone]