find_kth_nearest

[Renaud Detry]

> Like said before, I very much like having a functor/predicate to
> control the behavior of find. But it might be difficult to find how to
> do it: the more complicated the function, the more difficult it is for
> people to use it.
>
> I don't see a simple solution right now. At the moment, adding a nth
> _M_find_... could be easier: it would not break the design of the
> existing _M_find_...

I can try that for the moment.

Thank you for the feedback!

Renaud.