Trying out lambdas and std::function in C++11

Makefile

all: test_Factory

test_Factory: test_Factory.cpp
	$(CXX) -std=c++0x -o test_Factory test_Factory.cpp 

test_Factory.cpp

#include <iostream>
#include <map>
#include <functional>

class Foo {
  public:
    Foo(int Bar_) : Bar(Bar_) {  }
    int Bar;
};

int main()
{
  auto f = []() { return 1; };

  std::cout << f() << std::endl;

  auto g = [](int i){ return new Foo(i); };
  std::map< std::string, std::function<Foo* (int)> > fooMap;
  fooMap[ "foo"] = g;

  auto x = g(2);
  std::cout << x->Bar << std::endl;
  delete x;

  auto y = fooMap["foo"](3);
  std::cout << y->Bar << std::endl;
  delete y;  

  std::function<int ()> h = []() { return 4; };
  std::cout << h() << std::endl;

  std::map< std::string, std::function<int ()> > theMap;
  theMap[ "foo"] = []() { return 5; };
  theMap[ "bar"] = []() { return 6; };

  std::cout << theMap["foo"]() << std::endl;
  std::cout << theMap["bar"]() << std::endl;

  return 0;
}