weirdness.cpp

#include <iostream>
#include <vector>
#include <map>
#include <string>
#include <functional>

class Table
{
public:
	Table() : table_() {}

	void registerFunction(std::string name, std::function<int()> foo) {
		table_[name] = foo;
	}

	int callByString(std::string s)
	{
		auto iter = table_.find(s);
		if (iter != table_.end())
			return iter->second();

		return -1;
	}

private:

	std::map<std::string, std::function<int()>> table_;
};

class Engine
{
public:
	Engine(Table *t) {
		t->registerFunction("f1", std::bind(&Engine::f1, this));
		t->registerFunction("f2", &Engine::f2);
	}
private:
	int f1() { return 1; };
	static int f2() { return 2; };
};

int main()
{
	Table t;
	Engine e(&t);

	std::cout << t.callByString("f1");
	return 0;
}

Not exactly my brace style.
(I use 1TBS)