Print numbers from 1 to 1000 without a loop

gistfile1.cpp

#include <iostream>

template <int N> struct P
{
    P()
    {
        P<N - 1>();
        std::cout << N << std::endl;
    }
};

template <> struct P<1>
{
    P() { std::cout << 1 << std::endl; }
};

int main()
{
    P<1000>();
    return 0;
}