Eugene van der Pijll wrote: >Or: instead of making observance_for_datetime a method in the standard >TZ distribution, make a separate distribution, with class >DT::TZ::Observance (or maybe somewhere in DT::Util? DT::Ev?).
Yes, that's probably better for the heavyweight approach. Still need a lightweight version to go in the timezone classes themselves. Presumably we'll go for the lightest form then, just dealing with the transition instants. >DT::TZ would than have to implement just a single method to get at the >raw data; for example DT::TZ->get_transition( $dt ), which returns the >first transition after $dt, or the first transition if no $dt is passed. I definitely want a backward iterator. ->prev in DT::TZ::O will require it, of course. This comes back to the interface issues already discussed for the boundary-based interface. -zefram
