Check if number is prime during compilation in C++

I have a template class that takes an unsigned integer as template parameter, but I have to make sure that number is a prime. I can check it in the constructor, for instance, but it would be better to do it during compilation.

Here's the Assert template I'm using:

template <bool statement>
class Assert;

template <>
struct Assert<true> {};

I can simply create an object of this type in any piece of code which is going to be compiled, using my condition as parameter, and it won't compile if that condition is false. The problem is that I have to check if some number is prime. Let it be n.

I've came up with the idea of including a separate file "PrimeTest.h" and trying to divide n by each number from n-1 to 1 by including the same file from inside that file. That is how I use it:

#define SUSPECT n
#include "PrimeTest.h"

This is the "PrimeTest.h":

#ifdef SUSPECT

    #ifndef CURRENT
        #define CURRENT (SUSPECT-1)
    #endif // CURRENT

    #ifndef FINISHED

    #if CURRENT>100
        #define IS_PRIME
        #define FINISHED
    #else
        #if SUSPECT%CURRENT==0
            #define IS_NOT_PRIME
            #define FINISHED
        #else
            #define CURRENT (CURRENT-1)  // THAT DOES NOT WORK!!!
            #include "PrimeTest.h"
        #endif // SUSPECT % CURRENT != 0
    #endif

    #endif // FINISHED

#endif // SUSPECT

But here's the problem: I can't decrement CURRENT in any way I could come up with, including temporary values and #pragma push_macro directives. Any ideas how to do that?