Help with specific template function

[Vladimirs Nordholm]

On Sunday, 25 March 2018 at 18:24:37 UTC, Vladimirs Nordholm 
wrote:
> The underlying problems are:
> * How do I ensure the two first arguments (used as coordinates) 
> are types of numbers (all kinds: ints, floats, reals, etc.)
> * At least one argument is passed after the coordinates

I found a solution which satisfies my needs :)

     void foo(X, Y, Args...)(X x, Y y, Args args)
     if (__traits(isArithmetic, x) && __traits(isArithmetic, y) && 
args.length >= 1)
     {
         // ...
     }