C 预处理器的替代品 [关闭]

根据 C 预处理器的替代品

m4
define(`FIB', `
define(`N', $1)
define(`FIB_ITER', `
define(`A', 0)
define(`B', 1)
define(`I', 0)
define(`FIB_LOOP', `
ifelse(I, N, `', `
  define(`C', eval(A + B))
  define(`A', B)
  define(`B', C)
  define(`I', eval(I + 1))
  FIB_LOOP')
FIB_LOOP')
FIB_ITER')
FIB(10)

cpp
#include 
#include 
#define FACTORIAL(z, n, data) BOOST_PP_MUL(n, data)
#define N 5
#define RESULT BOOST_PP_REPEAT(N, FACTORIAL, N)
int main() {
    int factorial = RESULT;
    return 0;
}

cpp
template
struct Fibonacci {
    static constexpr int value = Fibonacci::value + Fibonacci::value;
};
template<>
struct Fibonacci<0> {
    static constexpr int value = 0;
};
template<>
struct Fibonacci<1> {
    static constexpr int value = 1;
};
int main() {
    constexpr int fibonacci = Fibonacci<10>::value;
    return 0;
}