SysTime.add!"days" missing

[Spacen Jasset]

On Monday, 17 March 2014 at 14:39:16 UTC, Adam D. Ruppe wrote:
> On Monday, 17 March 2014 at 14:31:54 UTC, Spacen Jasset wrote:
>> Thanks. What devilish magic allows for the syntax 60.days? 
>> (how does it work)
>
> There's a function in core.time:
>
> Duration days(int n);
>
>
> D functions f(x, t...) can also be called x.f(t) (or x.f 
> without parameters if there's no additional arguments).
>
> This works on all types, it is called uniform function call 
> syntax, or UFCS. It lets us extend other things with new 
> methods.


Thanks Adam, is there a good explanation anywhere? It must be 
newish.