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| #include <iostream>
template <bool b>
struct bool_instant
{
constexpr static int value = b;
};
using true_instant = bool_instant<true>;
using false_instant = bool_instant<false>;
template <int... pack>
struct intArrayPack
{
constexpr static int length = sizeof...(pack);
constexpr static int value[sizeof...(pack)] = {pack...};
};
template <int N, int current = 2, int flag = 0>
struct isPrime : isPrime<N, current + 1, !!!(N % current)>{};
template <int N>
struct isPrime<N, N, 0> : true_instant{};
template <int N, int current>
struct isPrime<N, current, 1> : false_instant{};
template <int N, int current = 2, bool flag = false, int... pack>
struct primePack : primePack<N, current + 1, isPrime<current>::value, pack...>{};
template <int N, int current, int... pack>
struct primePack<N, current, true, pack...> : primePack<N, current, false, current - 1, pack...>{};
template <int N, int... pack>
struct primePack<N, N, false, pack...> : intArrayPack<pack...>{};
int main()
{
auto numlist = primePack<220>::value;
for (auto i = 0; i < primePack<220>::length; i++)
{
std::cout << numlist[i] << " ";
}
return 0;
}
|