[Issue 8411] core.time: No easy way to check if Duration is empty

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=8411


Jonathan M Davis <jmdavisProg at gmx.com> changed:

           What    |Removed                     |Added
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                 CC|                            |jmdavisProg at gmx.com


--- Comment #1 from Jonathan M Davis <jmdavisProg at gmx.com> 2013-01-24 12:36:20 PST ---
We now have Duration.zero, so

if(duration != Duration.zero)

will work as will

if(duration != Duration.init)

But there's no such thing as an "empty" duration. All durations have a value,
and they aren't ranges or containers. It makes as much sense to have an isEmpty
property on a Duration as it does to have it on an int.

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