Capturing lvalue references in C++11 lambdas sample code

gistfile1.txt

#include <iostream>
#include <typeinfo>

void ref2ref()
{
  std::cout << "ref2ref\n";

	int foo = 7;
	int& rfoo = foo;
	int& rfoo1 = rfoo;
	int& rfoo2 = rfoo1;

	std::cout << "foo:" << foo << ", rfoo:" << rfoo << ", rfoo1:" << rfoo1 << ", rfoo2:" << rfoo2 << '\n';
	++foo;
	std::cout << "foo:" << foo << ", rfoo:" << rfoo << ", rfoo1:" << rfoo1 << ", rfoo2:" << rfoo2 << '\n';
	std::cout << "&foo:" << &foo << ", &rfoo:" << &rfoo << ", &rfoo1:" << &rfoo1 << ", &rfoo2:" << &rfoo2 << '\n';
}

void lambda_ref2ref()
{
	std::cout << "lambda_ref2ref\n";

	int foo = 99;
	int& rfoo = foo;
	int& rfoo1 = foo;

	std::cout << "foo:" << foo << ", rfoo:" << rfoo << ", rfoo1:" << rfoo1 << '\n';
	std::cout << "&foo:" << &foo << ", &rfoo:" << &rfoo << ", &rfoo1:" << &rfoo1 << '\n';

	auto l = [foo, rfoo, &rfoo1]()
	{
		std::cout << "foo:" << foo << '\n';
		std::cout << "rfoo:" << rfoo << '\n';
		std::cout << "rfoo1:" << rfoo1 << '\n';

		std::cout << "&foo:" << &foo << ", &rfoo:" << &rfoo << ", &rfoo1:" << &rfoo1 << '\n';
	};

	foo = 100;

	l();
}

void simple_ref2nonref()
{
	int foo = 7;
	int& rfoo = foo;
	int bar = foo;
	auto baz = rfoo;

	std::cout << "typeid(baz):" << typeid(baz).name() << '\n';
}

class Bar
{
private:
	int mValue;

public:
	Bar(const Bar&) : mValue(9999)
	{
	}

public:
	Bar(const int value) : mValue(value) {}
	int GetValue() const { return mValue; }
	void SetValue(const int value) { mValue = value; }
};

void prevent_capture_byvalue()
{
	// UDT with copying disallowed
Bar bar(1);
Bar& rbar = bar;
Bar& rbar1 = bar;

std::cout << "&bar:" << &bar << ", &rbar:" << &rbar<< ", &rbar1:" << &rbar1 << '\n';

auto l2 = [bar, rbar, &rbar1]()
{
	std::cout << "bar:" << bar.GetValue() << '\n';
	std::cout << "rbar:" << rbar.GetValue() << '\n';
	std::cout << "rbar1:" << rbar1.GetValue() << '\n';

	std::cout << "&bar:" << &bar << ", &rbar:" << &rbar<< ", &rbar1:" << &rbar1 << '\n';
};

bar.SetValue(2);

l2();
}

int main()
{
	ref2ref();
	lambda_ref2ref();
	simple_ref2nonref();
	prevent_capture_byvalue();
}