"isDroppable" range trait for slicing to end

[Jonathan M Davis]

On Monday, October 29, 2012 21:56:36 Jens Mueller wrote:
> I find it amazing how many bugs your unittests catch.

That's why they're there. It's far too easy to miss a corner case and end up 
with mostly working but still buggy code (especially with date/time stuff). At 
one point, I had a bug with B.C. years that ended in 99 that I only caught 
when I made some of the tests more thorough. Being thorough seems to be the 
only way to catch all those sorts of problems. And in spite of all of that, 
I've still had a bug or two in the calculations when it was merged into Phobos 
(long since fixed).

DST switches are particularly nasty though, particularly since Microsoft 
absolutely sucks at time stuff, including the fact that it has a pitifully 
small number of time zones, and most of them are wrong. Testing that stuff 
across platforms is a major PITA, but I've tried very hard to guarantee that 
the behavior is the same across systems. Unfortunately, it looks like I'm 
going to have to spend some time figuring out how to hack around Windows 8's 
stupidity though.

- Jonathan M Davis