How to put pointers to class functions in std::map?

Question

OOP

Let's say I have a class

class Foo
{
public:
    static Foo *fromFoo();
    static Foo *fromBar();
};

How do I create such an associative array that will contain function pointers so that I can dynamically create objects from a string, without the noodles of the formif(str == "foo") {} ....

Answer 1

I may seem like a bore, but Boost:: Function is not?

Answer 2

Static methods are regular functions.

typedef (Foo*) (*func)();
std::map<std::string, func> map;
map["fromFoo"] = &Foo::fromFoo;
map["fromBar"] = &Foo::fromBar;

Answer 3

Well, you can keep in the map not pointers to a function, but to a class factory. Or is it necessary just like that - through functions?