<URL: https://rt.cpan.org/Ticket/Display.html?id=79845 >
On Tue Sep 25 07:27:53 2012, MHASCH wrote:
> To demonstrate that the current rounding behaviour is not
> quite thought through, try:
>
> use DateTime 0.76;
> my $d = DateTime->new(
> year => 2012,
> month => 9,
> day => 25,
> hour => 12,
> minute => 39,
> second => 59,
> nanosecond => 999876000,
> time_zone => 'Europe/Berlin',
> );
> print $d->strftime('%H:%M:%S.%3N'), "\n";
>
> This will print "12:39:59.1000" rather than "12:39:59.999".
> And no, please don't make it print "12:40:00.000" either.
> Rounding is just not the right thing to do by default.
There were a few RT tickets about this and I've thought about it a fair
bit. I think your solution is right.
This gets really messy with a datetime like 2011-12-31T23:59:59.999
To round properly we'd have to round every single unit, including the
year! There's really no way to do this in strftime and format_cldr
anyway, since you can only dictate the formatting _per unit_, so you
might not even be printing out all the units which need rounding.
