std::experimental::source_location:: column

#include <experimental/source_location>
#include <iostream>
template<typename T = std::experimental::source_location>
inline void pos(const T& location = T::current())
{
    std::cout
        << "("
        << location.line()
        << ':' 
        << location.column()
        << ") ";
}
int main()
{
    pos(); std::cout << "Proxima\n";
    pos(); std::cout << "Centauri\n";
}