Easy way to construct filesystem paths with parameter pack.

join.cc

#include <filesystem>
#include <string>

namespace fs = std::filesystem;

template <typename... Args>
void join(fs::path& p, Args&&... args) {
    ((p /= std::forward<Args>(args)), ...);
}

template <typename... Args>
std::string constructPath(Args&&... args) {
    fs::path result;
    (join(result, args), ...);
    return result;
}