[boost] [date_time] [#1861] Change for the default duration format

Subject: [boost] [date_time] [#1861] Change for the default duration format
From: Andrey Semashev (andrey.semashev_at_[hidden])
Date: 2009-05-31 08:31:42

Hi,

There's a Boost.DateTime ticket:

https://svn.boost.org/trac/boost/ticket/1861

The initial problem was that the default handling of the %H format specifier 
(passing it to strftime) played badly with time durations that could be longer 
than 24 hours. The resolution was to provide additional %O format specifier 
that does not have 24 hour restriction.

However the original poster proposes to change the default format of time 
durations from %H:%M:%S%F to %O:%M:%S%F so that formatted durations are always 
allowed to be longer than 24 hours. I mostly agree with this change, however 
it is clearly a breaking change that can affect error checking in some cases. 
What do the community and the maintainer (Jeff?) in particular think about 
this?