#include <iostream>
#include <string>
#include <map>

class Derpbar {

        typedef void (*Handle)(const std::string&);
        typedef std::map<std::string, Handle> handleMap;

    public:

        void addHandle(const std::string& name, Handle func) {
            handles[name] = func;
        }
        void test(const std::string& name) {
            handles[name]("Works!");
        }

    private:

        handleMap handles;
};

void sth(const std::string& out) { std::cout<<out<<std::endl; }

int main() {
        auto herp = new Derpbar();
        herp->addHandle("download", sth);
        herp->test("download");
        return 0;
}