Htykuut

I have a task to create function Factory(const std::string name) that returns pointer to function without arguments that prints name. Also I should use only native language methods (without lambda functions and etc). Could you give me example?

Annotations in the code. I deliberately did not make it print to std::cout directly but instead it will return the string. Adapt it as you please.

#include <iostream>



struct bork {              // the object to hold the text to return

    std::string text;      // the text to return



    // constructor

    bork(const std::string& in) : text(in) {}



    // the operator that makes the object behave like a function    

    std::string operator ()(void) const { return text; }



    // a factory method to create a "bork"

    static bork make_bork(const std::string& text) {

        return bork(text);

    }



};



int main() {

    auto a = bork::make_bork("howdy");

    auto b = bork::make_bork("world");



    std::cout << a() << "n";

    std::cout << b() << "n";

}

You cannot create a function in a function. The only way is to know all the strings there will appear and having a functions for each possible string, and then select and return the proper function. Or else you can use objects :-)