unrolled_fizzbuzz.cpp

#include <stdio.h>

template <int N> struct fizz    { enum { flags = 0 }; };
template<>       struct fizz<0> { enum { flags = 1 }; };

template <int N> struct buzz    { enum { flags = 0 }; };
template<>       struct buzz<0> { enum { flags = 2 }; };

template <int F, int N> struct show       { show() { printf("%d\n", N); } };
template <int N>        struct show<1, N> { show() { printf("Fizz\n"); } };
template <int N>        struct show<2, N> { show() { printf("Buzz\n"); } };
template <int N>        struct show<3, N> { show() { printf("FizzBuzz\n"); } };

template <int N>
struct loop {
    show<(fizz<N % 3>::flags | buzz<N % 5>::flags), N> s;
    loop<(N + 1)> l;
};

template <>
struct loop<101> {};

loop<1> l;

int main(void) {}