finally for C++0x

gistfile1.cpp

// reference: http://stackoverflow.com/questions/6167515/simulating-finally-block-in-c0x

#include <functional>

class finally
{
    std::function<void (void)> const action;
    finally(const finally&) = delete;

public:
    finally(std::function<void (void)> a)
        : action(a)
    {}

    ~finally() { action(); }
};

#include <iostream>

using namespace std;

int main(int argc, char *argv[])
{
	{
		finally clean_up([&]{
		    cout << "finally, this statement was executed." << endl;
		});
		cout << "do something, which may raise." << endl;
	}
	return 0;
}

// don't forget c++0x compiler, such as "g++ -std=c++0x"