constexpr of static tuple class member has linker error

Question

I have the following code:

#include 
#include 

class T
{
    public:
        using Names = std::tuple

        

Answer 1

@Columbo posted the correct solution.

Unfortunately I am trying to build a header only library. The solution requires that the static member be compiled into one compilation unit (which is what I was using constexpr in the hopes of avoiding).

So I needed to stick another twist into the works to make it work. This is just to share my solution:

#include 

class T
{
    public:
        using Names = std::tuple;
        template
        static char const* getName()
        {
            static constexpr Names names {"First", "Second"};
            return std::get(names);
        }
};

int main()
{
    std::cout << T::getName<0>() << "\n";
}