RE: [Boost-users] date_time: why invalid_time_label in process_local_dst_start_day()

From: Ben Hutchings (ben.hutchings_at_[hidden])
Date: 2003-11-11 10:10:58

Michael Haubenwallner <michael.haubenwallner_at_[hidden]>:
> as i could not google out an answer for my problem with
> boost/date_time/dst_rules.hpp: is there a reason why
> "boost::date_time::dst_calculator::process_local_dst_start_day()"
> returns "invalid_time_label" for the transition time, but
> "process_local_dst_end_day()" returns "ambigous" ?
> Or is it just a bug ?

At the start of DST, the time goes directly from, say, 1:00 to 2:00,
so there is *no* point in time labelled 1:30 and it is invalid.

At the end of DST, the time goes directly from, say, 2:00 to 1:00,
so there are two points in time labelled 1:30 and it is ambiguous.