Is there a function for this?

[bauss]

Let's say you have a range with struct, but some of the struct 
are duplicates of each other.

Is there a standard function in Phobos to remove duplicates?

My first thought was "uniq", but it can't really do it like that, 
but it doesn't work.

See: https://run.dlang.io/is/IcFEtw

Is there another function in Phobos that perhaps would work?

I can of course write my own function, but if there is a standard 
function that can do it, then I'd rather use that.