Concatenate compile-time strings in a template at compile time?

Question

Currently I have:

template  struct typename_struct {
    static char const* name() { 
        return (std::string(typename_struc         


        

Answer 1

Alternative way without using recursive templates (but requires C++14):

#include 
template using is      = std::integer_sequence;
template   using make_is = std::make_integer_sequence;

constexpr auto size(const char*s) { int i = 0; while(*s!=0){++i;++s;} return i; }

template
struct concat_impl;

template
struct concat_impl, S2, is> {
    static constexpr const char value[]
    {
        S1[I1]..., S2[I2]..., 0
    };
};

template
constexpr auto concat {
    concat_impl, S2, make_is>::value
};

Example:

constexpr const char a[] = "int";
constexpr const char c[] = "**";

#include 
int main()
{
    std::cout << concat << '\n';
}

append characters to string can also be implemented like this, by replacing the second const char* parameter with char....